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CAMOBSERVINGEVENTS
For the first half of the 20th Century, Mount Wilson was the most famous observatory in the world. The biggest telescopes were here, and their new designs were changing the way astronomy was done. Among the many discoveries made on the mountain, a few revolutionized our understanding of our place in MOUNT WILSON OBSERVATORY Free of charge, there is also a small Astronomical Museum on the observatory grounds, the CHARA Interferometry Exhibit, and great hiking. Hours: From April 4, 2020 through November 29, 2020, the observatory is open to visitors everyday from 10:00 a.m. to 5:00 p.m. On weekends during the regular season, the observatory gates openearlier at 8:30
MOUNT WILSON OBSERVATORY Sunstar is an art/science collaboration of Liliane Lijn and astrophysicist John Vallerga. An array of six prisms, Sunstar takes incoming sunlight and refracts it, bending the light and spreading it into a spectrum–all the colors of the rainbow. It is mounted near the top of the Observatory’s 150-foot Solar Telescope Tower. MOUNT WILSON OBSERVATORY Historical Highlights from Mount Wilson Observatory’s First 100 Years . June 13, 1904: George Ellery Hale signs 99-year lease with Mount Wilson Toll Road Company. December 20, 1904: the Carnegie Institution of Washington agrees to fund the “Mount Wilson Solar Observatory.”; 1905: Snow solar telescope becomes operational at Mount Wilson. Read an article on the founding of the solar program. MOUNT WILSON OBSERVATORY George Ellery Hale; Bringing Astronomy to an Isolated Mountaintop; Entering a New Era in Solar Research; Building the 60-inch Telescope; Building the 100-inch Telescope MOUNT WILSON OBSERVATORY Our Story. In 1904, the Mount Wilson Observatory was founded by George Ellery Hale under the auspices of the Carnegie Institution of Washington. In that year, Hale brought the Snow Solar Telescope from Yerkes Observatory in southern Wisconsin to the sunnier and steadier skies of Mount Wilson to continue his studies of the Sun. MOUNT WILSON OBSERVATORY Hours: Saturdays & Sundays, 10:00 am – 5:00 pm, Until we close for the season after December 2. Mount Wilson Observatory’s Cosmic Cafe offers a variety of freshly made sandwiches and other treats and souvenirs to visitors to the Observatory. The Cafe is located in the Pavilion overlooking the large parking lot at the entrance to the MOUNT WILSON OBSERVATORY Mount Wilson Observatory’s 60-inch telescope was completed in 1908 by Observatory founder George Ellery Hale with funding from Andrew Carnegie. It was the world’s largest operational telescope until Hale went on to complete the Mt. Wilson 100-inch telescope in 1917. For a more detailed history of this revolutionary instrument, whichbecame
MOUNT WILSON OBSERVATORY With the construction of the 60-inch telescope imminent, John D. Hooker, a prominent local businessman and friend of Hale, offered to pay for the production of the mirror for an even larger instrument, an 84-inch. Hale jumped at the opportunity, and his enthusiasm prompted Hooker to raise the ante. Hale would have his mirror, but it must be100
MOUNT WILSON OBSERVATORY The First Annual Mount Wilson Observatory 5K Fundraiser was a big success! We raised 5,000 dollars for improvements to the mountaintop to make it an even better place to visit. A big THANK YOU to all the runners and volunteers who helped out! We will run it again next year! All proceeds from this fundraiser will be used for these specificprojects:
MOUNT WILSON OBSERVATORYOUR STORYVISITINGCONDITIONSTOWERCAMOBSERVINGEVENTS
For the first half of the 20th Century, Mount Wilson was the most famous observatory in the world. The biggest telescopes were here, and their new designs were changing the way astronomy was done. Among the many discoveries made on the mountain, a few revolutionized our understanding of our place in MOUNT WILSON OBSERVATORY Free of charge, there is also a small Astronomical Museum on the observatory grounds, the CHARA Interferometry Exhibit, and great hiking. Hours: From April 4, 2020 through November 29, 2020, the observatory is open to visitors everyday from 10:00 a.m. to 5:00 p.m. On weekends during the regular season, the observatory gates openearlier at 8:30
MOUNT WILSON OBSERVATORY Sunstar is an art/science collaboration of Liliane Lijn and astrophysicist John Vallerga. An array of six prisms, Sunstar takes incoming sunlight and refracts it, bending the light and spreading it into a spectrum–all the colors of the rainbow. It is mounted near the top of the Observatory’s 150-foot Solar Telescope Tower. MOUNT WILSON OBSERVATORY Historical Highlights from Mount Wilson Observatory’s First 100 Years . June 13, 1904: George Ellery Hale signs 99-year lease with Mount Wilson Toll Road Company. December 20, 1904: the Carnegie Institution of Washington agrees to fund the “Mount Wilson Solar Observatory.”; 1905: Snow solar telescope becomes operational at Mount Wilson. Read an article on the founding of the solar program. MOUNT WILSON OBSERVATORY George Ellery Hale; Bringing Astronomy to an Isolated Mountaintop; Entering a New Era in Solar Research; Building the 60-inch Telescope; Building the 100-inch Telescope MOUNT WILSON OBSERVATORY Our Story. In 1904, the Mount Wilson Observatory was founded by George Ellery Hale under the auspices of the Carnegie Institution of Washington. In that year, Hale brought the Snow Solar Telescope from Yerkes Observatory in southern Wisconsin to the sunnier and steadier skies of Mount Wilson to continue his studies of the Sun. MOUNT WILSON OBSERVATORY Hours: Saturdays & Sundays, 10:00 am – 5:00 pm, Until we close for the season after December 2. Mount Wilson Observatory’s Cosmic Cafe offers a variety of freshly made sandwiches and other treats and souvenirs to visitors to the Observatory. The Cafe is located in the Pavilion overlooking the large parking lot at the entrance to the MOUNT WILSON OBSERVATORY Mount Wilson Observatory’s 60-inch telescope was completed in 1908 by Observatory founder George Ellery Hale with funding from Andrew Carnegie. It was the world’s largest operational telescope until Hale went on to complete the Mt. Wilson 100-inch telescope in 1917. For a more detailed history of this revolutionary instrument, whichbecame
MOUNT WILSON OBSERVATORY With the construction of the 60-inch telescope imminent, John D. Hooker, a prominent local businessman and friend of Hale, offered to pay for the production of the mirror for an even larger instrument, an 84-inch. Hale jumped at the opportunity, and his enthusiasm prompted Hooker to raise the ante. Hale would have his mirror, but it must be100
MOUNT WILSON OBSERVATORY The First Annual Mount Wilson Observatory 5K Fundraiser was a big success! We raised 5,000 dollars for improvements to the mountaintop to make it an even better place to visit. A big THANK YOU to all the runners and volunteers who helped out! We will run it again next year! All proceeds from this fundraiser will be used for these specificprojects:
MOUNT WILSON OBSERVATORY Mount Wilson Observatory, Southern California’s historic home to over 100 years of groundbreaking astronomical discovery, proudlyannounces it
MOUNT WILSON OBSERVATORY Historical Highlights from Mount Wilson Observatory’s First 100 Years . June 13, 1904: George Ellery Hale signs 99-year lease with Mount Wilson Toll Road Company. December 20, 1904: the Carnegie Institution of Washington agrees to fund the “Mount Wilson Solar Observatory.”; 1905: Snow solar telescope becomes operational at Mount Wilson. Read an article on the founding of the solar program. MOUNT WILSON OBSERVATORY Our 60″ Telescope. Mount Wilson’s 60-inch telescope provides incredible views of some of the most beautiful objects in the night sky and is among the largest in the world accessible to public viewing. Click on 60-inch Telescope Brochure below for more details on this unique experience. To help visualize an evening at the telescope,our
MOUNT WILSON OBSERVATORY 2020 Special Events. We have an exciting schedule of events planned for the mountain this year! Beginning in March, we will list upcoming concerts, lectures, and more here. Check back soon! We are planning a limited number of Individual Public Ticket Nights for the big telescopes and Star Party Nights. The 2019 Cosmic Sounds evenings were MOUNT WILSON OBSERVATORY Cosmic Sounds. In the summer of 2020, Mount Wilson Observatory will have encore performances of Jeff Talman’s Cosmic Sounds inside the magnificent 100-inch Telescope dome, combined with viewing through the telescope. Stay tuned for the dates to follow, here and on thehomepage.
MOUNT WILSON OBSERVATORY The Observatory is managed by the Mount Wilson Institute, a 501 (c) (3) non-profit incorporated in the State of California, FEIN 77-0132297. We will acknowledge your membership fee and that you received no goods or services in exchange for your donation and itshould be
MOUNT WILSON OBSERVATORY Mount Wilson Observatory | CHARA. One of the six domes of the CHARA array appears shiny and new compared to the 150-foot solar telescope, on the left, and the 100-inch Hooker telescope, on the right. The two older telescopes have since been given a fresh coat of white paint. Photo: Elisa Webster. MOUNT WILSON OBSERVATORY The rates are $2700 per half night and $5000 per full night for a group of up to 20 people. Pre-session Tours of the Observatory: A private tour can be combined with an observing session for a nominal extra fee (a minimum of $150 which covers up to ten quests; for additional guests we charge an additional $15 per person).This is a great way to get grounded in the remarkable history of the MOUNT WILSON OBSERVATORY To learn more about Mount Wilson’s STEM Educational Program for your school, contact Jessica Rodriguez at stemed@mtwilson.edu or by phone at (571) 762-5850. Edwin Hubble guiding the 100-inch telescope. High school students from Magnolia Science Academy in Van Nuys examine the historic 60-inch telescope, which astronomer Harlow Shapley used in MOUNT WILSON OBSERVATORY The First Annual Mount Wilson Observatory 5K Fundraiser was a big success! We raised 5,000 dollars for improvements to the mountaintop to make it an even better place to visit. A big THANK YOU to all the runners and volunteers who helped out! We will run it again next year! All proceeds from this fundraiser will be used for these specificprojects:
MOUNT WILSON OBSERVATORYOUR STORYVISITINGCONDITIONSTOWERCAMOBSERVINGEVENTS
For the first half of the 20th Century, Mount Wilson was the most famous observatory in the world. The biggest telescopes were here, and their new designs were changing the way astronomy was done. Among the many discoveries made on the mountain, a few revolutionized our understanding of our place in MOUNT WILSON OBSERVATORY Free of charge, there is also a small Astronomical Museum on the observatory grounds, the CHARA Interferometry Exhibit, and great hiking. Hours: From April 4, 2020 through November 29, 2020, the observatory is open to visitors everyday from 10:00 a.m. to 5:00 p.m. On weekends during the regular season, the observatory gates openearlier at 8:30
MOUNT WILSON OBSERVATORY Sunstar is an art/science collaboration of Liliane Lijn and astrophysicist John Vallerga. An array of six prisms, Sunstar takes incoming sunlight and refracts it, bending the light and spreading it into a spectrum–all the colors of the rainbow. It is mounted near the top of the Observatory’s 150-foot Solar Telescope Tower. MOUNT WILSON OBSERVATORY Historical Highlights from Mount Wilson Observatory’s First 100 Years . June 13, 1904: George Ellery Hale signs 99-year lease with Mount Wilson Toll Road Company. December 20, 1904: the Carnegie Institution of Washington agrees to fund the “Mount Wilson Solar Observatory.”; 1905: Snow solar telescope becomes operational at Mount Wilson. Read an article on the founding of the solar program. MOUNT WILSON OBSERVATORY George Ellery Hale; Bringing Astronomy to an Isolated Mountaintop; Entering a New Era in Solar Research; Building the 60-inch Telescope; Building the 100-inch Telescope MOUNT WILSON OBSERVATORY Hours: Saturdays & Sundays, 10:00 am – 5:00 pm, Until we close for the season after December 2. Mount Wilson Observatory’s Cosmic Cafe offers a variety of freshly made sandwiches and other treats and souvenirs to visitors to the Observatory. The Cafe is located in the Pavilion overlooking the large parking lot at the entrance to the MOUNT WILSON OBSERVATORY Our Story. In 1904, the Mount Wilson Observatory was founded by George Ellery Hale under the auspices of the Carnegie Institution of Washington. In that year, Hale brought the Snow Solar Telescope from Yerkes Observatory in southern Wisconsin to the sunnier and steadier skies of Mount Wilson to continue his studies of the Sun. MOUNT WILSON OBSERVATORY Mount Wilson Observatory’s 60-inch telescope was completed in 1908 by Observatory founder George Ellery Hale with funding from Andrew Carnegie. It was the world’s largest operational telescope until Hale went on to complete the Mt. Wilson 100-inch telescope in 1917. For a more detailed history of this revolutionary instrument, whichbecame
MOUNT WILSON OBSERVATORY With the construction of the 60-inch telescope imminent, John D. Hooker, a prominent local businessman and friend of Hale, offered to pay for the production of the mirror for an even larger instrument, an 84-inch. Hale jumped at the opportunity, and his enthusiasm prompted Hooker to raise the ante. Hale would have his mirror, but it must be100
MOUNT WILSON OBSERVATORY The First Annual Mount Wilson Observatory 5K Fundraiser was a big success! We raised 5,000 dollars for improvements to the mountaintop to make it an even better place to visit. A big THANK YOU to all the runners and volunteers who helped out! We will run it again next year! All proceeds from this fundraiser will be used for these specificprojects:
MOUNT WILSON OBSERVATORYOUR STORYVISITINGCONDITIONSTOWERCAMOBSERVINGEVENTS
For the first half of the 20th Century, Mount Wilson was the most famous observatory in the world. The biggest telescopes were here, and their new designs were changing the way astronomy was done. Among the many discoveries made on the mountain, a few revolutionized our understanding of our place in MOUNT WILSON OBSERVATORY Free of charge, there is also a small Astronomical Museum on the observatory grounds, the CHARA Interferometry Exhibit, and great hiking. Hours: From April 4, 2020 through November 29, 2020, the observatory is open to visitors everyday from 10:00 a.m. to 5:00 p.m. On weekends during the regular season, the observatory gates openearlier at 8:30
MOUNT WILSON OBSERVATORY Sunstar is an art/science collaboration of Liliane Lijn and astrophysicist John Vallerga. An array of six prisms, Sunstar takes incoming sunlight and refracts it, bending the light and spreading it into a spectrum–all the colors of the rainbow. It is mounted near the top of the Observatory’s 150-foot Solar Telescope Tower. MOUNT WILSON OBSERVATORY Historical Highlights from Mount Wilson Observatory’s First 100 Years . June 13, 1904: George Ellery Hale signs 99-year lease with Mount Wilson Toll Road Company. December 20, 1904: the Carnegie Institution of Washington agrees to fund the “Mount Wilson Solar Observatory.”; 1905: Snow solar telescope becomes operational at Mount Wilson. Read an article on the founding of the solar program. MOUNT WILSON OBSERVATORY George Ellery Hale; Bringing Astronomy to an Isolated Mountaintop; Entering a New Era in Solar Research; Building the 60-inch Telescope; Building the 100-inch Telescope MOUNT WILSON OBSERVATORY Hours: Saturdays & Sundays, 10:00 am – 5:00 pm, Until we close for the season after December 2. Mount Wilson Observatory’s Cosmic Cafe offers a variety of freshly made sandwiches and other treats and souvenirs to visitors to the Observatory. The Cafe is located in the Pavilion overlooking the large parking lot at the entrance to the MOUNT WILSON OBSERVATORY Our Story. In 1904, the Mount Wilson Observatory was founded by George Ellery Hale under the auspices of the Carnegie Institution of Washington. In that year, Hale brought the Snow Solar Telescope from Yerkes Observatory in southern Wisconsin to the sunnier and steadier skies of Mount Wilson to continue his studies of the Sun. MOUNT WILSON OBSERVATORY Mount Wilson Observatory’s 60-inch telescope was completed in 1908 by Observatory founder George Ellery Hale with funding from Andrew Carnegie. It was the world’s largest operational telescope until Hale went on to complete the Mt. Wilson 100-inch telescope in 1917. For a more detailed history of this revolutionary instrument, whichbecame
MOUNT WILSON OBSERVATORY With the construction of the 60-inch telescope imminent, John D. Hooker, a prominent local businessman and friend of Hale, offered to pay for the production of the mirror for an even larger instrument, an 84-inch. Hale jumped at the opportunity, and his enthusiasm prompted Hooker to raise the ante. Hale would have his mirror, but it must be100
MOUNT WILSON OBSERVATORY The First Annual Mount Wilson Observatory 5K Fundraiser was a big success! We raised 5,000 dollars for improvements to the mountaintop to make it an even better place to visit. A big THANK YOU to all the runners and volunteers who helped out! We will run it again next year! All proceeds from this fundraiser will be used for these specificprojects:
MOUNT WILSON OBSERVATORY The mission of the Mount Wilson Institute is to manage and promote the Mount Wilson Observatory for scientific research, historic preservation, education, public engagement, and the arts.Your gener MOUNT WILSON OBSERVATORY Historical Highlights from Mount Wilson Observatory’s First 100 Years . June 13, 1904: George Ellery Hale signs 99-year lease with Mount Wilson Toll Road Company. December 20, 1904: the Carnegie Institution of Washington agrees to fund the “Mount Wilson Solar Observatory.”; 1905: Snow solar telescope becomes operational at Mount Wilson. Read an article on the founding of the solar program. MOUNT WILSON OBSERVATORY 2020 Special Events. We have an exciting schedule of events planned for the mountain this year! Beginning in March, we will list upcoming concerts, lectures, and more here. Check back soon! We are planning a limited number of Individual Public Ticket Nights for the big telescopes and Star Party Nights. The 2019 Cosmic Sounds evenings were MOUNT WILSON OBSERVATORY Mount Wilson Observatory | CHARA. One of the six domes of the CHARA array appears shiny and new compared to the 150-foot solar telescope, on the left, and the 100-inch Hooker telescope, on the right. The two older telescopes have since been given a fresh coat of white paint. Photo: Elisa Webster. MOUNT WILSON OBSERVATORY The Observatory is managed by the Mount Wilson Institute, a 501 (c) (3) non-profit incorporated in the State of California, FEIN 77-0132297. We will acknowledge your membership fee and that you received no goods or services in exchange for your donation and itshould be
MOUNT WILSON OBSERVATORY Mount Wilson has been of interest to astronomers for over 100 years. A station of Harvard College Observatory was placed here briefly beginning in 1889. In 1903, George Ellery Hale came out from the University of Chicago, where he had already established the Yerkes Observatory. At Hale’s urging, the fledgling Carnegie Insititutionof
MOUNT WILSON OBSERVATORY The rates are $2700 per half night and $5000 per full night for a group of up to 20 people. Pre-session Tours of the Observatory: A private tour can be combined with an observing session for a nominal extra fee (a minimum of $150 which covers up to ten quests; for additional guests we charge an additional $15 per person).This is a great way to get grounded in the remarkable history of the MOUNT WILSON OBSERVATORY To learn more about Mount Wilson’s STEM Educational Program for your school, contact Jessica Rodriguez at stemed@mtwilson.edu or by phone at (571) 762-5850. Edwin Hubble guiding the 100-inch telescope. High school students from Magnolia Science Academy in Van Nuys examine the historic 60-inch telescope, which astronomer Harlow Shapley used in MOUNT WILSON OBSERVATORY The First Annual Mount Wilson Observatory 5K Fundraiser was a big success! We raised 5,000 dollars for improvements to the mountaintop to make it an even better place to visit. A big THANK YOU to all the runners and volunteers who helped out! We will run it again next year! All proceeds from this fundraiser will be used for these specificprojects:
MOUNT WILSON OBSERVATORY The 60-inch diameter disk of plate glass, 7 1/2 inches thick and weighing 1900 pounds (860 kg), was purchased by Hale’s father, William, in 1894 as a gift to help his son’s career. After its arrival from the St. Gobain glass works in France in 1896, the elder Hale gave the disk to the University of Chicago, which was thenbuilding the
MOUNT WILSON OBSERVATORYOUR STORYVISITINGCONDITIONSTOWERCAMOBSERVINGEVENTS
Attention Mount Wilson Observatory science history buffs and future Docents: Our Trustee, longtime Docent, and retired JPL astrophysicist, Tim Thompson has a recorded Zoom presentation available here.. One of a series of online presentations from Palomar Observatory, Thompson’s 2/06/21 talk highlights many of the innovations and discoveries in astronomy made at Mount Wilson Observatory. MOUNT WILSON OBSERVATORY Purchasing Tickets. Tickets are $15 (adults) and $13 (ages 12 and under & 62 and older). Tour tickets are available for same-day purchase at the Cosmic Café, and rarely sell out. MOUNT WILSON OBSERVATORY George Ellery Hale; Bringing Astronomy to an Isolated Mountaintop; Entering a New Era in Solar Research; Building the 60-inch Telescope; Building the 100-inch Telescope MOUNT WILSON OBSERVATORY About the Artists. Liliane Lijn (1939) was born in New York, studied in Paris and lives in London. Internationally exhibited since the 1960s, her works are held in numerous collections including Tate London, British Museum, V&A and FNAC in Paris. MOUNT WILSON OBSERVATORY The enclosure for the launch/return equipment of the Michelson speed of light experiment. (photo courtesy of the Huntington Library and the Carnegie Observatories.). MOUNT WILSON OBSERVATORY Some of the founding staff and guests of the Observatory pose behind the Monastery. Left to Right: H. L. Miller (construction superintendent), Charles Greely Abbott (Smithsonian Institution), George Ellery Hale (first director), Leonard Ross Ingersoll (Abbot’s assistant), Ferdinand Ellerman, Walter Sydney Adams (second director) Edward E. Barnard (visiting from Yerkes to make wide-angle MOUNT WILSON OBSERVATORY In order to get all of the material safely to the mountaintop, transportation had to be improved. When Hooker made his gift for the mirror in 1906, the mountain was at the end of a steep and dusty 9-mile footpath, with no way to get there except by foot or on the back of a horse or mule. MOUNT WILSON OBSERVATORY Mount Wilson Institute (“MWI”) is a non-profit 501(c)(3) tax-exempt corporation that operates Mount Wilson Observatory pursuant to agreements with the Carnegie Institution of Washington (“Carnegie”) and the United State Forest Service. MOUNT WILSON OBSERVATORY Come up the mountain for a wonderful lunch in an incomparable setting! Hours: Saturdays & Sundays, 10:00 am – 5:00 pm, Until we close for the season after December 2. MOUNT WILSON OBSERVATORY Entering a New Era in Solar Research By Mike Simmons “It cannot too often be repeated that the Sun is the only star whose phenomena can be studied in detail.” MOUNT WILSON OBSERVATORYOUR STORYVISITINGCONDITIONSTOWERCAMOBSERVINGEVENTS
Attention Mount Wilson Observatory science history buffs and future Docents: Our Trustee, longtime Docent, and retired JPL astrophysicist, Tim Thompson has a recorded Zoom presentation available here.. One of a series of online presentations from Palomar Observatory, Thompson’s 2/06/21 talk highlights many of the innovations and discoveries in astronomy made at Mount Wilson Observatory. MOUNT WILSON OBSERVATORY Purchasing Tickets. Tickets are $15 (adults) and $13 (ages 12 and under & 62 and older). Tour tickets are available for same-day purchase at the Cosmic Café, and rarely sell out. MOUNT WILSON OBSERVATORY George Ellery Hale; Bringing Astronomy to an Isolated Mountaintop; Entering a New Era in Solar Research; Building the 60-inch Telescope; Building the 100-inch Telescope MOUNT WILSON OBSERVATORY About the Artists. Liliane Lijn (1939) was born in New York, studied in Paris and lives in London. Internationally exhibited since the 1960s, her works are held in numerous collections including Tate London, British Museum, V&A and FNAC in Paris. MOUNT WILSON OBSERVATORY The enclosure for the launch/return equipment of the Michelson speed of light experiment. (photo courtesy of the Huntington Library and the Carnegie Observatories.). MOUNT WILSON OBSERVATORY Some of the founding staff and guests of the Observatory pose behind the Monastery. Left to Right: H. L. Miller (construction superintendent), Charles Greely Abbott (Smithsonian Institution), George Ellery Hale (first director), Leonard Ross Ingersoll (Abbot’s assistant), Ferdinand Ellerman, Walter Sydney Adams (second director) Edward E. Barnard (visiting from Yerkes to make wide-angle MOUNT WILSON OBSERVATORY In order to get all of the material safely to the mountaintop, transportation had to be improved. When Hooker made his gift for the mirror in 1906, the mountain was at the end of a steep and dusty 9-mile footpath, with no way to get there except by foot or on the back of a horse or mule. MOUNT WILSON OBSERVATORY Mount Wilson Institute (“MWI”) is a non-profit 501(c)(3) tax-exempt corporation that operates Mount Wilson Observatory pursuant to agreements with the Carnegie Institution of Washington (“Carnegie”) and the United State Forest Service. MOUNT WILSON OBSERVATORY Come up the mountain for a wonderful lunch in an incomparable setting! Hours: Saturdays & Sundays, 10:00 am – 5:00 pm, Until we close for the season after December 2. MOUNT WILSON OBSERVATORY Entering a New Era in Solar Research By Mike Simmons “It cannot too often be repeated that the Sun is the only star whose phenomena can be studied in detail.” MOUNT WILSON OBSERVATORY The mission of the Mount Wilson Institute is to manage and promote the Mount Wilson Observatory for scientific research, historic preservation, education, public engagement, and the arts.Your gener MOUNT WILSON OBSERVATORY STEM Educational Programs. Regular private tours are available for school groups, but we also organize STEM Educational Programs with astronomers from Carnegie Observatories and JPL going into more detail on some of basic science underpinning Mount Wilson astronomy. MOUNT WILSON OBSERVATORY Membership Levels. Hover over the name of one of our distinguished astronomers at each membership level to see the associated benefits. (Astronomer Henrietta Swan Leavitt was a “human computer” at Harvard College Observatory, yet her work was so essential to many of the great discoveries at Mount Wilson Observatory, we have adopted her as our second level.) MOUNT WILSON OBSERVATORY Its unique facilities, scenic beauty and proximity to the filming capital of the world, make Mount Wilson Observatory an attractive location for filming of all types, from television commercials, to educational programs, to feature motion pictures. MOUNT WILSON OBSERVATORY Some of the founding staff and guests of the Observatory pose behind the Monastery. Left to Right: H. L. Miller (construction superintendent), Charles Greely Abbott (Smithsonian Institution), George Ellery Hale (first director), Leonard Ross Ingersoll (Abbot’s assistant), Ferdinand Ellerman, Walter Sydney Adams (second director) Edward E. Barnard (visiting from Yerkes to make wide-angle MOUNT WILSON OBSERVATORY Our Story. In 1904, the Mount Wilson Observatory was founded by George Ellery Hale under the auspices of the Carnegie Institution of Washington. In that year, Hale brought the Snow Solar Telescope from Yerkes Observatory in southern Wisconsin to the sunnier and steadier skies of Mount Wilson to continue his studies of the Sun. MOUNT WILSON OBSERVATORY In order to get all of the material safely to the mountaintop, transportation had to be improved. When Hooker made his gift for the mirror in 1906, the mountain was at the end of a steep and dusty 9-mile footpath, with no way to get there except by foot or on the back of a horse or mule. MOUNT WILSON OBSERVATORY Visit the post for more. Students in the Los Angeles area have the unique opportunity to visit the mountaintop where humanity discovered its place in the Universe–from our position in the Milky Way to Hubble’s observations, proving our galaxy is one of billions, all in an expanding Universe. MOUNT WILSON OBSERVATORY Come up the mountain for a wonderful lunch in an incomparable setting! Hours: Saturdays & Sundays, 10:00 am – 5:00 pm, Until we close for the season after December 2. MOUNT WILSON OBSERVATORY Mount Wilson Institute (“MWI”) is a non-profit 501(c)(3) tax-exempt corporation that operates Mount Wilson Observatory pursuant to agreements with the Carnegie Institution of Washington (“Carnegie”) and the United State Forest Service. MOUNT WILSON OBSERVATORYOUR STORYVISITINGCONDITIONSTOWERCAMOBSERVINGEVENTS
Attention Mount Wilson Observatory science history buffs and future Docents: Our Trustee, longtime Docent, and retired JPL astrophysicist, Tim Thompson has a recorded Zoom presentation available here.. One of a series of online presentations from Palomar Observatory, Thompson’s 2/06/21 talk highlights many of the innovations and discoveries in astronomy made at Mount Wilson Observatory. MOUNT WILSON OBSERVATORY Purchasing Tickets. Tickets are $15 (adults) and $13 (ages 12 and under & 62 and older). Tour tickets are available for same-day purchase at the Cosmic Café, and rarely sell out. MOUNT WILSON OBSERVATORY What’s that Strange Light on Top of Mount Wilson? During the last year or so we have been asked this question many times. We have been testing a special art installation called Sunstar, created and owned by artist Liliane Lijn and astrophysicist John Vallerga. MOUNT WILSON OBSERVATORY Visit the post for more. Our 60″ Telescope. Mount Wilson’s 60-inch telescope provides incredible views of some of the most beautiful objects in the night sky and is MOUNT WILSON OBSERVATORY George Ellery Hale; Bringing Astronomy to an Isolated Mountaintop; Entering a New Era in Solar Research; Building the 60-inch Telescope; Building the 100-inch Telescope MOUNT WILSON OBSERVATORY Some of the founding staff and guests of the Observatory pose behind the Monastery. Left to Right: H. L. Miller (construction superintendent), Charles Greely Abbott (Smithsonian Institution), George Ellery Hale (first director), Leonard Ross Ingersoll (Abbot’s assistant), Ferdinand Ellerman, Walter Sydney Adams (second director) Edward E. Barnard (visiting from Yerkes to make wide-angle MOUNT WILSON OBSERVATORY Mount Wilson Institute (“MWI”) is a non-profit 501(c)(3) tax-exempt corporation that operates Mount Wilson Observatory pursuant to agreements with the Carnegie Institution of Washington (“Carnegie”) and the United State Forest Service. MOUNT WILSON OBSERVATORY George Ellery Hale; Bringing Astronomy to an Isolated Mountaintop; Entering a New Era in Solar Research; Building the 60-inch Telescope; Building the 100-inch Telescope MOUNT WILSON OBSERVATORY In order to get all of the material safely to the mountaintop, transportation had to be improved. When Hooker made his gift for the mirror in 1906, the mountain was at the end of a steep and dusty 9-mile footpath, with no way to get there except by foot or on the back of a horse or mule. MOUNT WILSON OBSERVATORY Come up the mountain for a wonderful lunch in an incomparable setting! Hours: Saturdays & Sundays, 10:00 am – 5:00 pm, Until we close for the season after December 2. MOUNT WILSON OBSERVATORYOUR STORYVISITINGCONDITIONSTOWERCAMOBSERVINGEVENTS
Attention Mount Wilson Observatory science history buffs and future Docents: Our Trustee, longtime Docent, and retired JPL astrophysicist, Tim Thompson has a recorded Zoom presentation available here.. One of a series of online presentations from Palomar Observatory, Thompson’s 2/06/21 talk highlights many of the innovations and discoveries in astronomy made at Mount Wilson Observatory. MOUNT WILSON OBSERVATORY Purchasing Tickets. Tickets are $15 (adults) and $13 (ages 12 and under & 62 and older). Tour tickets are available for same-day purchase at the Cosmic Café, and rarely sell out. MOUNT WILSON OBSERVATORY What’s that Strange Light on Top of Mount Wilson? During the last year or so we have been asked this question many times. We have been testing a special art installation called Sunstar, created and owned by artist Liliane Lijn and astrophysicist John Vallerga. MOUNT WILSON OBSERVATORY Visit the post for more. Our 60″ Telescope. Mount Wilson’s 60-inch telescope provides incredible views of some of the most beautiful objects in the night sky and is MOUNT WILSON OBSERVATORY George Ellery Hale; Bringing Astronomy to an Isolated Mountaintop; Entering a New Era in Solar Research; Building the 60-inch Telescope; Building the 100-inch Telescope MOUNT WILSON OBSERVATORY Some of the founding staff and guests of the Observatory pose behind the Monastery. Left to Right: H. L. Miller (construction superintendent), Charles Greely Abbott (Smithsonian Institution), George Ellery Hale (first director), Leonard Ross Ingersoll (Abbot’s assistant), Ferdinand Ellerman, Walter Sydney Adams (second director) Edward E. Barnard (visiting from Yerkes to make wide-angle MOUNT WILSON OBSERVATORY Mount Wilson Institute (“MWI”) is a non-profit 501(c)(3) tax-exempt corporation that operates Mount Wilson Observatory pursuant to agreements with the Carnegie Institution of Washington (“Carnegie”) and the United State Forest Service. MOUNT WILSON OBSERVATORY George Ellery Hale; Bringing Astronomy to an Isolated Mountaintop; Entering a New Era in Solar Research; Building the 60-inch Telescope; Building the 100-inch Telescope MOUNT WILSON OBSERVATORY In order to get all of the material safely to the mountaintop, transportation had to be improved. When Hooker made his gift for the mirror in 1906, the mountain was at the end of a steep and dusty 9-mile footpath, with no way to get there except by foot or on the back of a horse or mule. MOUNT WILSON OBSERVATORY Come up the mountain for a wonderful lunch in an incomparable setting! Hours: Saturdays & Sundays, 10:00 am – 5:00 pm, Until we close for the season after December 2. MOUNT WILSON OBSERVATORY Historical Highlights from Mount Wilson Observatory’s First 100 Years . June 13, 1904: George Ellery Hale signs 99-year lease with Mount Wilson Toll Road Company. December 20, 1904: the Carnegie Institution of Washington agrees to fund the “Mount Wilson Solar Observatory.”; 1905: Snow solar telescope becomes operational at Mount Wilson. Read an article on the founding of the solar program. MOUNT WILSON OBSERVATORY Visit the post for more. Our 60″ Telescope. Mount Wilson’s 60-inch telescope provides incredible views of some of the most beautiful objects in the night sky and is MOUNT WILSON OBSERVATORY Its unique facilities, scenic beauty and proximity to the filming capital of the world, make Mount Wilson Observatory an attractive location for filming of all types, from television commercials, to educational programs, to feature motion pictures. MOUNT WILSON OBSERVATORY Membership Levels. Hover over the name of one of our distinguished astronomers at each membership level to see the associated benefits. (Astronomer Henrietta Swan Leavitt was a “human computer” at Harvard College Observatory, yet her work was so essential to many of the great discoveries at Mount Wilson Observatory, we have adopted her as our second level.) MOUNT WILSON OBSERVATORY Executive Director. Mr. Thomas Meneghini Voice: (562) 413-2950. Regular Mail. Mount Wilson Institute P.O. Box 94146 Pasadena, CA 91109. Deliveries. MWI c/o Carnegie Observatories MOUNT WILSON OBSERVATORY To mark the centennial of the 100-inch Telescope in 2017, the Observatory held our first public astronomy lecture in many years and began our new series of public talks, inaugurated by U.C. Berkeley professor of astronomy, Alex Filipenko. MOUNT WILSON OBSERVATORY In order to get all of the material safely to the mountaintop, transportation had to be improved. When Hooker made his gift for the mirror in 1906, the mountain was at the end of a steep and dusty 9-mile footpath, with no way to get there except by foot or on the back of a horse or mule. MOUNT WILSON OBSERVATORY Our Story. In 1904, the Mount Wilson Observatory was founded by George Ellery Hale under the auspices of the Carnegie Institution of Washington. In that year, Hale brought the Snow Solar Telescope from Yerkes Observatory in southern Wisconsin to the sunnier and steadier skies of Mount Wilson to continue his studies of the Sun. MOUNT WILSON OBSERVATORY The rates are $2700 per half night and $5000 per full night for a group of up to 20 people. Pre-session Tours of the Observatory: A private tour can be combined with an observing session for a nominal extra fee (a minimum of $150 which covers up to ten quests; for additional guests we charge an additional $15 per person).This is a great way to get grounded in the remarkable history of the MOUNT WILSON OBSERVATORY by Mike Simmons. With the dedication of the great 40-inch refracting telescope at Yerkes Observatory in southern Wisconsin in 1897, George Ellery Hale had completed the world’s largest telescope.__ __
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Where We Discovered Our Place in the Universe Museum & Grounds Closed Guided Tours Available Telescope Viewing Sessions Private Tours by Appointment VISIT US DONATE Weekend Public Tours Will Resume April 4,2020
MOUNT WILSON OBSERVATORY STATUS MOUNT WILSON OBSERVATORY IS CURRENTLY CLOSED. TO DO OUR PART IN THE COMMUNITY EFFORT TO SLOW THE SPREAD OF THE COVID-19 VIRUS, WE ARE ALSO CANCELLING ALL PUBLIC ACTIVITIES ON THE MOUNTAIN DURING THE MONTH OF APRIL, WHEN OUR SEASON NORMALLY STARTS. BECAUSE OF THE EVOLVING CRISIS, WE CAN’T KNOW HOW LONG MOUNT WILSON OBSERVATORY WILL BE CLOSED AND HOW OUR EVENTS WILL BE AFFECTED. SO WE ARE NOT SELLING TICKETS OR TAKING RESERVATIONS NOW. WE WILL BE LOOKING AT THIS MONTH BY MONTH AND WILL LET YOU KNOW WHEN WE CAN RESUME OUR EVENTS. PLEASE CHECK BACK. THE MAIN ENTRANCE GATE, COSMIC CAFE, AND BATHROOMS WILL REMAIN CLOSED UNTIL THE BEGINNING OF MAY AT LEAST. HIKERS: IN ADDITION TO THE OBSERVATORY FACILITIES, MANY OF THE ANGELES FOREST TRAILS ARE NOW CLOSED, AS WELL AS RED BOX ROAD UP TO THE OBSERVATORY FROM ANGELES CREST HIGHWAY. PLEASE CHECK WITH THE U.S. FOREST SERVICE FOR INFORMATION ON TRAIL STATUS BEFORE HIKING IN THE AREA. WHEN THE TRAILS REOPEN WE WILL LET YOU KNOW HERE. BEST WISHES AND HEALTH TO ALL. For the first half of the 20th Century, Mount Wilson was the most famous observatory in the world. The biggest telescopes were here, and their new designs were changing the way astronomy was done. Among the many discoveries made on the mountain, a few revolutionized our understanding of our place in the Universe. Here, during WWI, Harlow Shapley measured the size of the Milky Way Galaxy for the first time and located our position in it, far from the center. Then, in 1924, Edwin Hubble proved that the mysterious spiral nebulae, which astronomers had speculated about for decades, were in fact distant galaxies similar to our own. Then Hubble teamed up with Milton Humason and confirmed that this immense Universe was expanding. Space itself was getting bigger. This finding, when run backwards in time, led a few decades later to the Big Bang Theory. Mount Wilson is where modern observational cosmology began. It holds a unique place in humanity’s search for our most distant origins. Today, our original solar and nighttime telescopes, the world’s largest for two generations of astronomers, have been joined by the new CHARA array, which has the highest resolution of any optical or infrared system ever built, achieving unprecedented views of the stars. A publicity photo of astronomer Edwin Hubble guiding Mount Wilson’s 100-inch Telescope in 1924, shortly after he proved the existence of distant galaxies. Photo: Carnegie Observatories/ Huntington Library.Video Player
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Use Up/Down Arrow keys to increase or decrease volume. COMET “ATLAS” VIEWED FROM MOUNT WILSON OBSERVATORY (IT’S FIZZLEDSINCE)
Blake Estes, on maintenance staff, is an expert astrophotographer. Recently, he made this movie clip of Comet Atlas from one of the Observatory’s smaller telescopes, when it had the potential to become the brightest comet in decades. It was first seen on December 28, 2019 by the Asteroid Terrestrial-impact Last Alert System (ATLAS) on Mauna Loa in Hawaii, hence the informal name. It’s other designation is Comet C/2019 Y4. In the two months, before Blake’s photos, it had grown 6,000 times brighter, attaining magnitude +7.5 onApril 1.
Unfortunately, around April 2, the comet began to disintegrate. It continues to fade, rather than brighten. SUBSCRIBE TO MOUNT WILSON OBSERVATORY NEWS FOR UPDATES ON 2020 CONCERTS, LECTURES, TOURS, PUBLIC TELESCOPE NIGHTS, AND OTHER EVENTS.CLICK HERE
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THE WINTER ISSUE OF OUR QUARTERLY NEWSLETTER, _REFLECTIONS_ IS NOWAVAILABLE ONLINE.
Click here
to read the Winter newsletter. The main article tells about the first measurement of a distant star. This feat, equivalent to measuring the size of a dime forty miles away, was achieved at Mount Wilson in 1920, almost a hundred years ago. George Ellery Hale, the founder of the Observatory, invited physicist Albert Michelson to use the 100-inch Telescope for the effort. His technique, called stellar interferometry, was pioneered on the mountain and is now used here routinely to measure stellar diameters. The Observatory’s CHARA Array, operated by Georgia State University, has the highest resolution in visible and infrared light of any telescope system ever built. It can measure the size of stars much smaller than the Sun with an accuracy of about 5%. Also in this issue: We remember Dr. Greg Smith, who bequeathed his estate to the Observatory. And some media highlights. We particularly recommend KCET’s episode of _LOST LA_ on the Observatory which youcan find here.
EXPLORE MOUNT WILSON IN PERSON * Take a Sat. or Sun. 11:30 am & 1:00 pm Public Guided tour.
* Schedule your own Private Tour.
* Free weekend Solar Observing.
* Have lunch at our Cosmic Café.
* Check out our calendar of Special Events. * Enjoy a Sunday Concert in the Dome. * Learn about current research in astronomy at a Talk and TelescopesNight.
* View through 60-inch or100-inch
telescopes.
EXPLORE MOUNT WILSON ON-LINE * Take a spherical panoramic tour.
* Interactive map and virtual tour of the Observatory’s facilities. * Learn about the Observatory’s history.
* Watch KCET’s _Lost L.A._ episode on Mount Wilson * Watch Huell Howser’s _California’s Gold_ episode on MountWilson
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* Watch a 2012 oral history walking tour with Don Nicholson.
* Check out the CHARA Array website. * Watch videos about CHARA’scutting-edge
technology.
* Look at the latest image of the Observatory from Tower cam.
* See today’s sunspot drawing from the 150-ft solar tower. * Watch Above the Inversion Layer and experience a full revolution of the 100-inch Telescope dome. SUPPORT MOUNT WILSON OBSERVATORY * Become a Member of the Observatory!
* Help keep the Observatory operations going and preserve its famous telescopes for future generations, Donate!
* Join the people who keep the Observatory programs going, Volunteer.
MOUNT WILSON OBSERVATORY’S NEW MEMBERSHIP PROGRAM Join the Observatory as a member! By doing so, you get a number of benefits and you help us renew this historic mountaintop, so that it may inspire well into the future. We aim to build a larger community to keep us moving forward with educational STEM programs, undergraduate research, public outreach, ongoing scientific research, and restoration of our 116-year-old observatory. Please consider becoming a member in 2020, to help us through this year. If you can. Sign up for the individual membership, family membership, or a higher level, all named after one of our famous astronomers. Sign up is easy. Click here to go to our membership page. WHAT’S THAT STRANGE LIGHT ON TOP OF MOUNT WILSON? Called SUNSTAR, it is an array of six prisms which take incoming sunlight and refract it, bending the light and spreading it into a spectrum–all the colors of the rainbow. It is mounted near the top of the Observatory’s 150-foot Solar Telescope Tower. With motion controls, it can be remotely directed to project the spectrum to a specific point in the Los Angeles basin. An observer below will see an intense point of light in a single wavelength, shining like a brilliant jewel from the ridgeline of Mount Wilson, 5800 feet above in the San Gabriel Mountains. The prisms can be moved to change the color of light an observer sees, or the observer can walk in one direction or another to change the color. In this case, the observer is actually walking across a giant spectrum some 250 yards long. While still very bright, at the great distances involved, it is perfectly safe to look at a single wavelength of sunlight. For more information and a schedule, go to our Sunstar page. THE CENTENNIAL, PAPER ARCHITECTURAL MODEL OF THE 100-INCH TELESCOPE IS NOW AVAILABLE TO DOWNLOAD FOR A SMALL DONATION TO MOUNT WILSON OBSERVATORY. CLICK HERETO GO TO
THE MODEL PAGE.
George Ellery Hale, 1910. Photo: Carnegie/ Huntington Library The Observatory’s founder, George Ellery Hale, built four
telescopes, each one in succession becoming the largest in the world. Here they are shown to the same scale. His first was the 40-inch refractor at Yerkes (in Wisconsin) on the left, but then he began building the more revolutionary–and more compact–reflector telescopes, using a large mirror instead of a lens. His next two are on Mount Wilson, the 60-inch and the 100-inch. (While not quite as grand as his last, these two had the light-gathering power for astronomers to discover our place in the expanding Universe.) His fourth, the 200-inch Hale Telescope at Palomar, is represented on the right by one of Russell Porter’s famous cutaway drawings. This image has been reversed and extended on the left side for a better comparison of the relative sizes of the full domes. Hale’s telescopes were the biggest from 1897, when Yerkes opened, to 1993, when the Keck telescope in Hawaii was completed–a span of 96 years. To see these drawings enlarged, click here. Drawing credits:
University of Chicago/Yerkes Observatory, Carnegie Observatories, Palomar Observatory/Caltech. To view our Facebook feed, please click here.
Mount Wilson Obs. @MtWilsonObs Wednesday, February 19th, 2020 at6:53pm
HELP WANTED: A manager for The Cosmic Cafe at Mount Wilson Observatory! Info on our website: https://t.co/Ampa8MrWoJ https://t.co/H5caK4dcATView on Twitter
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Mount Wilson Obs. @MtWilsonObs Tuesday, December 31st, 2019 at8:52pm
We hope you’ve all had a wonderful holiday season and a Happy New Year! Unfortunately, the observatory and grounds will not not be open until further notice due to hazardous conditions and the closure of Red Box Road. We will give an update when everything is re-opened.#snow
https://t.co/3R6M9rbrV7View on Twitter
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Mount Wilson Obs. Retweeted · NWS Los Angeles @NWSLosAngeles Thursday, December 26th, 2019 at3:26am
The Tornado Warning that was in effect for southeastern Santa Barbara County has been CANCELLED as the storm has weakened and does not appear capable of producing a tornado. #CAwx#SBAweather
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Mount Wilson Obs. Retweeted · NWS Los Angeles @NWSLosAngeles Thursday, December 26th, 2019 at3:18am
Tornado Warning including Carpinteria CA, Montecito CA, Summerland CA until 10:30 PM PST https://t.co/rSsMTqGyMAView on Twitter
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Mount Wilson Obs. Retweeted ·Carnegie Science
@carnegiescience Thursday, December 5th, 2019 at 5:10pm 100 years ago #EdwinHubblejoined
@CarnegieAstro (then @MtWilsonObs ) and proceeded to revolutionize astronomy. Tune in tonight to learn all about The Day We Found the Universe from @CosmosGal and@johnmulchaey :
https://t.co/bcTtNx5SPI 6:30 Eastern/3:30 Pacific https://t.co/bnvC9RRGzwView on Twitter
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