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LIMITING MAGNITUDE
March 9, 2018: Finally! A Clear But Cold Night at the Dark Site. On Wednesday night, after last month’s windy failure, I finally got a good night out at the DAS Dark Site. Well, half a night anyway, before I felt like a popsicle and packed it up and went home. I was out for three hours, but what a three hours! The afternoon was glorious inCLOUDY NIGHTS
December 21, 2015 – Electronically Assisted Astronomy, Cloudy Nights, and “Cloudy Nights”. Another of the “what I did last summer” items was to learn about the wonders of Electronically Assisted Astronomy. This is where you attach a video camera to thefocuser or
ORION SIRIUS PRO AZ/EQ-G June 16, 2017: The Orion Sirius Pro AZ/EQ-G mount, Part Two – Great Locating and Tracking! and the Celestron Lithium Powertank. Power problems solved! The Celestron Lithium Iron Phosphate Powertank (which I’ll more fully describe below) puts out 3 amps, and powers thismount excellently.
FEBRUARY 21, 2016: A NINE DOLLAR EYEPIECE? THE 23MM VITE After reading some very positive reviews about them in this Cloudy Nights thread, I decided to buy some super-duper-cheap eyepieces, for no other reason than to satisfy my curiosity about them. Well, and because I'm super-duper-cheap, too. These are the Vite aspheric 62-degree EPs, which cost just NINE BUCKS each. (These are also soldunder the
LIGHT POLLUTION REDUCTION FILTER The same day as the Levenhuk/Baader solar filter arrived, another filter arrived, too: The Baader Moon and Skyglow Filter. Suh-weet! So, between the sun and the night sky, it was really a very full and enjoyable day and night of observing. AUGUST 11, 2018: DON’T BUY A 10-INCH DOB OVER AN 8 No, no, this isn’t yet another anti-dob rant; longtime readers will know that I actually do like dobs. No, this is more of a heads-up as to the differences between these two popular sizes of dobs, the 8 and the 10, and why, unless you’re a gym rat, you might not want to buy a 10-inch dob instead of an 8. (Note the word “might” there.) APRIL 14, 2017: THE DRAGONFLY TELEPHOTO ARRAY, GALACTIC Having moved to Denver last summer, I could not attend NEAF this past weekend as I had the previous two years. However, that didn't stop me from "attending" the lectures. Unlike previous years, where only select lectures were posted to Youtube a few months afterwards, NEAF live-streamed all of the lectures on both Saturday andNOVEMBER 14, 2016
Ugh. I just need to rant and vent about this latest stupidmoon thing, which blends in with my hatred of the media in general of late. Yet again, the media has descended upon this stupid "supermoon" BS and hyped it for all it's worth. Needless to say, it seems like the collective memories of the LIGHT-POLLUTED ASTRONOMY Banner photo credit: Sarah Fisher, through a 127mm Mak Happy belated St. Patrick’s Day! Saturday night, the Denver Astronomical Society held its monthly Open House at Chamberlin Observatory. This is where the DAS invites members of the general public to come on out and look through the historic, 125-year-old 20-inch Alvan Clark refractor. STELLARIUM – LIGHT-POLLUTED ASTRONOMY On Wednesday night, after last month’s windy failure, I finally got a good night out at the DAS Dark Site. Well, half a night anyway, before I felt like a popsicle and packed it up and went home.LIMITING MAGNITUDE
March 9, 2018: Finally! A Clear But Cold Night at the Dark Site. On Wednesday night, after last month’s windy failure, I finally got a good night out at the DAS Dark Site. Well, half a night anyway, before I felt like a popsicle and packed it up and went home. I was out for three hours, but what a three hours! The afternoon was glorious inCLOUDY NIGHTS
December 21, 2015 – Electronically Assisted Astronomy, Cloudy Nights, and “Cloudy Nights”. Another of the “what I did last summer” items was to learn about the wonders of Electronically Assisted Astronomy. This is where you attach a video camera to thefocuser or
ORION SIRIUS PRO AZ/EQ-G June 16, 2017: The Orion Sirius Pro AZ/EQ-G mount, Part Two – Great Locating and Tracking! and the Celestron Lithium Powertank. Power problems solved! The Celestron Lithium Iron Phosphate Powertank (which I’ll more fully describe below) puts out 3 amps, and powers thismount excellently.
FEBRUARY 21, 2016: A NINE DOLLAR EYEPIECE? THE 23MM VITE After reading some very positive reviews about them in this Cloudy Nights thread, I decided to buy some super-duper-cheap eyepieces, for no other reason than to satisfy my curiosity about them. Well, and because I'm super-duper-cheap, too. These are the Vite aspheric 62-degree EPs, which cost just NINE BUCKS each. (These are also soldunder the
LIGHT POLLUTION REDUCTION FILTER The same day as the Levenhuk/Baader solar filter arrived, another filter arrived, too: The Baader Moon and Skyglow Filter. Suh-weet! So, between the sun and the night sky, it was really a very full and enjoyable day and night of observing. AUGUST 11, 2018: DON’T BUY A 10-INCH DOB OVER AN 8 No, no, this isn’t yet another anti-dob rant; longtime readers will know that I actually do like dobs. No, this is more of a heads-up as to the differences between these two popular sizes of dobs, the 8 and the 10, and why, unless you’re a gym rat, you might not want to buy a 10-inch dob instead of an 8. (Note the word “might” there.) APRIL 14, 2017: THE DRAGONFLY TELEPHOTO ARRAY, GALACTIC Having moved to Denver last summer, I could not attend NEAF this past weekend as I had the previous two years. However, that didn't stop me from "attending" the lectures. Unlike previous years, where only select lectures were posted to Youtube a few months afterwards, NEAF live-streamed all of the lectures on both Saturday andNOVEMBER 14, 2016
Ugh. I just need to rant and vent about this latest stupidmoon thing, which blends in with my hatred of the media in general of late. Yet again, the media has descended upon this stupid "supermoon" BS and hyped it for all it's worth. Needless to say, it seems like the collective memories of the JANUARY 8, 2018: THE C9.25 OF MY DREAMS IS HERE! AND THE Well, I've finally done it! I've finally bought my long sought after Celestron 9.25-inch optical tube assembly (OTA). I had been very patient, waiting and waiting for a used one to come up for sale at a reasonable price with the newer Starbright XLT coatings, as they have about 10-15% greater light transmission than the STELLARIUM – LIGHT-POLLUTED ASTRONOMY Posts about Stellarium written by Jon. Yes, I know, I initially said that there were only going to be two of these entries, but they grew so long that I decided to split them up into three – and I’ve already edited where I said there would be two. JUNE 12, 2018: RMSS OBSERVING LISTS! Well, I'm getting super-psyched to be going to my first star party, the Rocky Mountain Star Stare, on Wednesday! My car is gonna be pretty full for the trip to sustain me for all 5 days. I've already packed all my astro stuff, my camping stuff, my clothes, books, and am now planning my meals. It'll BIRD-JONES TELESCOPE Welcome to our 2016 Telescope Buying Guide! This article was a collaboration between Jon Groubert and Sorin (aka the Soggy Astronomer). Jon has been an active contributor to Sorin’s page, How to Avoid the Agony When Buying Your First Telescope, answering reader questions for quite a while there, particularly with suggestions ongood telescopes to
SLT MOUNT – LIGHT-POLLUTED ASTRONOMY July 27, 2018: Goto Telescopes / Mounts. So, let’s say you bought your first scope for around $150 to $300 – maybe it’s the Astronomers Without Borders One Sky scope, or one of its clones, like the Meade Lightbridge 130. Perhaps you’ve bought a refractor, like the Meade Infinity 102. COLLIMATE – LIGHT-POLLUTED ASTRONOMY December 4, 2014: History of My Astronomizing, Part 2 – Getting the Mak. The Mak has a very different light path than a Newtonian. In a Newtonian, light enters from the top of the tube, reflects off of a primary parabolic mirror at the bottom of the tube, concentrating the light to a single point. Before it gets to that single point, the FEBRUARY 12, 2017: LET’S TALK ABOUT EYEPIECES, BABY Let's talk about all the good things, and the bad things, that may be. Let's talk about eyepieces! More to the point, let's talk about expensive eyepieces, also referred to as premium eyepieces. Obviously, as a preliminary matter, when you're selecting a new eyepiece, one of the first considerations should be how it fits in MAY 31, 2017: THE ORION SIRIUS PRO AZ/EQ-G MOUNT, PART ONE All four of my Jeopardy shows have now aired, and those that watched them know that I won! Yes, I am now officially a Three-Time Jeopardy Champion, and you’d better believe that that phrase will come up right at the end of every discussion I’m ever involved in for the rest of my life. (I kid, I kid.) If you’d like to watch my shows, here are some links:FEBRUARY 27, 2015
February 27, 2015 – The 10mm Luminos Eyepiece and EOFB. Right at the same time as I got the Ultrablock, I also received my new Celestron Luminos 10mm eyepiece. I had ordered it in early February, using up the last of my Amazon gift card. For some reason, there was a two-week delay in getting it out to me, which is pretty unusual for Amazon. MAY 15, 2017: CELESTRON OR MEADE? PC OR MAC? Celestron pretty much discontinued the “non-XLT Starbright” coatings once they introduced the “Starbright XLT” coatings around 2003, so those older scopes are about 15 years old. In this vein, coatings do “evaporate” or otherwise “go away” over time. Not instantly, not to a huge degree, but they do, and less coatings meansless
LIGHT-POLLUTED ASTRONOMY Banner photo credit: Sarah Fisher, through a 127mm Mak Happy belated St. Patrick’s Day! Saturday night, the Denver Astronomical Society held its monthly Open House at Chamberlin Observatory. This is where the DAS invites members of the general public to come on out and look through the historic, 125-year-old 20-inch Alvan Clark refractor.LIMITING MAGNITUDE
March 9, 2018: Finally! A Clear But Cold Night at the Dark Site. On Wednesday night, after last month’s windy failure, I finally got a good night out at the DAS Dark Site. Well, half a night anyway, before I felt like a popsicle and packed it up and went home. I was out for three hours, but what a three hours! The afternoon was glorious in ORION SIRIUS PRO AZ/EQ-G June 16, 2017: The Orion Sirius Pro AZ/EQ-G mount, Part Two – Great Locating and Tracking! and the Celestron Lithium Powertank. Power problems solved! The Celestron Lithium Iron Phosphate Powertank (which I’ll more fully describe below) puts out 3 amps, and powers thismount excellently.
CLOUDY NIGHTS
December 21, 2015 – Electronically Assisted Astronomy, Cloudy Nights, and “Cloudy Nights”. Another of the “what I did last summer” items was to learn about the wonders of Electronically Assisted Astronomy. This is where you attach a video camera to thefocuser or
TELEVUE – LIGHT-POLLUTED ASTRONOMY Posts about TeleVue written by Jon. The Mak comes with what’s called a red-dot finder. This is a small – and inexpensive – device that projects a small red dot onto a JANUARY 8, 2018: THE C9.25 OF MY DREAMS IS HERE! AND THE Well, I've finally done it! I've finally bought my long sought after Celestron 9.25-inch optical tube assembly (OTA). I had been very patient, waiting and waiting for a used one to come up for sale at a reasonable price with the newer Starbright XLT coatings, as they have about 10-15% greater light transmission than the FEBRUARY 21, 2016: A NINE DOLLAR EYEPIECE? THE 23MM VITE After reading some very positive reviews about them in this Cloudy Nights thread, I decided to buy some super-duper-cheap eyepieces, for no other reason than to satisfy my curiosity about them. Well, and because I'm super-duper-cheap, too. These are the Vite aspheric 62-degree EPs, which cost just NINE BUCKS each. (These are also soldunder the
AUGUST 11, 2018: DON’T BUY A 10-INCH DOB OVER AN 8 No, no, this isn’t yet another anti-dob rant; longtime readers will know that I actually do like dobs. No, this is more of a heads-up as to the differences between these two popular sizes of dobs, the 8 and the 10, and why, unless you’re a gym rat, you might not want to buy a 10-inch dob instead of an 8. (Note the word “might” there.) MAKSUTOV – LIGHT-POLLUTED ASTRONOMY December 4, 2014: History of My Astronomizing, Part 2 – Getting the Mak. The Mak has a very different light path than a Newtonian. In a Newtonian, light enters from the top of the tube, reflects off of a primary parabolic mirror at the bottom of the tube, concentrating the light to a single point. APRIL 14, 2017: THE DRAGONFLY TELEPHOTO ARRAY, GALACTIC Having moved to Denver last summer, I could not attend NEAF this past weekend as I had the previous two years. However, that didn't stop me from "attending" the lectures. Unlike previous years, where only select lectures were posted to Youtube a few months afterwards, NEAF live-streamed all of the lectures on both Saturday and LIGHT-POLLUTED ASTRONOMY Banner photo credit: Sarah Fisher, through a 127mm Mak Happy belated St. Patrick’s Day! Saturday night, the Denver Astronomical Society held its monthly Open House at Chamberlin Observatory. This is where the DAS invites members of the general public to come on out and look through the historic, 125-year-old 20-inch Alvan Clark refractor.LIMITING MAGNITUDE
March 9, 2018: Finally! A Clear But Cold Night at the Dark Site. On Wednesday night, after last month’s windy failure, I finally got a good night out at the DAS Dark Site. Well, half a night anyway, before I felt like a popsicle and packed it up and went home. I was out for three hours, but what a three hours! The afternoon was glorious in ORION SIRIUS PRO AZ/EQ-G June 16, 2017: The Orion Sirius Pro AZ/EQ-G mount, Part Two – Great Locating and Tracking! and the Celestron Lithium Powertank. Power problems solved! The Celestron Lithium Iron Phosphate Powertank (which I’ll more fully describe below) puts out 3 amps, and powers thismount excellently.
CLOUDY NIGHTS
December 21, 2015 – Electronically Assisted Astronomy, Cloudy Nights, and “Cloudy Nights”. Another of the “what I did last summer” items was to learn about the wonders of Electronically Assisted Astronomy. This is where you attach a video camera to thefocuser or
TELEVUE – LIGHT-POLLUTED ASTRONOMY Posts about TeleVue written by Jon. The Mak comes with what’s called a red-dot finder. This is a small – and inexpensive – device that projects a small red dot onto a JANUARY 8, 2018: THE C9.25 OF MY DREAMS IS HERE! AND THE Well, I've finally done it! I've finally bought my long sought after Celestron 9.25-inch optical tube assembly (OTA). I had been very patient, waiting and waiting for a used one to come up for sale at a reasonable price with the newer Starbright XLT coatings, as they have about 10-15% greater light transmission than the FEBRUARY 21, 2016: A NINE DOLLAR EYEPIECE? THE 23MM VITE After reading some very positive reviews about them in this Cloudy Nights thread, I decided to buy some super-duper-cheap eyepieces, for no other reason than to satisfy my curiosity about them. Well, and because I'm super-duper-cheap, too. These are the Vite aspheric 62-degree EPs, which cost just NINE BUCKS each. (These are also soldunder the
AUGUST 11, 2018: DON’T BUY A 10-INCH DOB OVER AN 8 No, no, this isn’t yet another anti-dob rant; longtime readers will know that I actually do like dobs. No, this is more of a heads-up as to the differences between these two popular sizes of dobs, the 8 and the 10, and why, unless you’re a gym rat, you might not want to buy a 10-inch dob instead of an 8. (Note the word “might” there.) MAKSUTOV – LIGHT-POLLUTED ASTRONOMY December 4, 2014: History of My Astronomizing, Part 2 – Getting the Mak. The Mak has a very different light path than a Newtonian. In a Newtonian, light enters from the top of the tube, reflects off of a primary parabolic mirror at the bottom of the tube, concentrating the light to a single point. APRIL 14, 2017: THE DRAGONFLY TELEPHOTO ARRAY, GALACTIC Having moved to Denver last summer, I could not attend NEAF this past weekend as I had the previous two years. However, that didn't stop me from "attending" the lectures. Unlike previous years, where only select lectures were posted to Youtube a few months afterwards, NEAF live-streamed all of the lectures on both Saturday andLIMITING MAGNITUDE
March 9, 2018: Finally! A Clear But Cold Night at the Dark Site. On Wednesday night, after last month’s windy failure, I finally got a good night out at the DAS Dark Site. Well, half a night anyway, before I felt like a popsicle and packed it up and went home. I was out for three hours, but what a three hours! The afternoon was glorious in SLT MOUNT – LIGHT-POLLUTED ASTRONOMY July 27, 2018: Goto Telescopes / Mounts. So, let’s say you bought your first scope for around $150 to $300 – maybe it’s the Astronomers Without Borders One Sky scope, or one of its clones, like the Meade Lightbridge 130. Perhaps you’ve bought a refractor, like the Meade Infinity 102. CELESTRON - LIGHT-POLLUTED ASTRONOMY July 27, 2018: Goto Telescopes / Mounts. So, let’s say you bought your first scope for around $150 to $300 – maybe it’s the Astronomers Without Borders One Sky scope, or one of its clones, like the Meade Lightbridge 130. Perhaps you’ve bought a refractor, like the Meade Infinity 102. Or, it could be that you bought something likethe
LIGHT POLLUTION REDUCTION FILTER The same day as the Levenhuk/Baader solar filter arrived, another filter arrived, too: The Baader Moon and Skyglow Filter. Suh-weet! So, between the sun and the night sky, it was really a very full and enjoyable day and night of observing. MAKSUTOV – LIGHT-POLLUTED ASTRONOMY December 4, 2014: History of My Astronomizing, Part 2 – Getting the Mak. The Mak has a very different light path than a Newtonian. In a Newtonian, light enters from the top of the tube, reflects off of a primary parabolic mirror at the bottom of the tube, concentrating the light to a single point. JUNE 12, 2018: RMSS OBSERVING LISTS! Well, I'm getting super-psyched to be going to my first star party, the Rocky Mountain Star Stare, on Wednesday! My car is gonna be pretty full for the trip to sustain me for all 5 days. I've already packed all my astro stuff, my camping stuff, my clothes, books, and am now planning my meals. It'll APRIL 19, 2016: SCIENCE! AND VIXEN! This Vixen is an 8″ catadioptric cassegrain, but with a twist. It is a sub-aperture Maksutov as well. That means there is a small meniscus just below the secondary, so that the light from the mirror passes through it twice; this design is known as a “Field Maksutov”. This blog is about observing from light-polluted skies. FEBRUARY 12, 2017: LET’S TALK ABOUT EYEPIECES, BABY Let's talk about all the good things, and the bad things, that may be. Let's talk about eyepieces! More to the point, let's talk about expensive eyepieces, also referred to as premium eyepieces. Obviously, as a preliminary matter, when you're selecting a new eyepiece, one of the first considerations should be how it fits inFEBRUARY 27, 2015
February 27, 2015 – The 10mm Luminos Eyepiece and EOFB. Right at the same time as I got the Ultrablock, I also received my new Celestron Luminos 10mm eyepiece. I had ordered it in early February, using up the last of my Amazon gift card. For some reason, there was a two-week delay in getting it out to me, which is pretty unusual for Amazon. MAY 31, 2017: THE ORION SIRIUS PRO AZ/EQ-G MOUNT, PART ONE All four of my Jeopardy shows have now aired, and those that watched them know that I won! Yes, I am now officially a Three-Time Jeopardy Champion, and you’d better believe that that phrase will come up right at the end of every discussion I’m ever involved in for the rest of my life. (I kid, I kid.) If you’d like to watch my shows, here are some links: LIGHT-POLLUTED ASTRONOMY Banner photo credit: Sarah Fisher, through a 127mm Mak Happy belated St. Patrick’s Day! Saturday night, the Denver Astronomical Society held its monthly Open House at Chamberlin Observatory. This is where the DAS invites members of the general public to come on out and look through the historic, 125-year-old 20-inch Alvan Clark refractor.LIMITING MAGNITUDE
March 9, 2018: Finally! A Clear But Cold Night at the Dark Site. On Wednesday night, after last month’s windy failure, I finally got a good night out at the DAS Dark Site. Well, half a night anyway, before I felt like a popsicle and packed it up and went home. I was out for three hours, but what a three hours! The afternoon was glorious inCLOUDY NIGHTS
December 21, 2015 – Electronically Assisted Astronomy, Cloudy Nights, and “Cloudy Nights”. Another of the “what I did last summer” items was to learn about the wonders of Electronically Assisted Astronomy. This is where you attach a video camera to thefocuser or
JANUARY 8, 2018: THE C9.25 OF MY DREAMS IS HERE! AND THE Well, I've finally done it! I've finally bought my long sought after Celestron 9.25-inch optical tube assembly (OTA). I had been very patient, waiting and waiting for a used one to come up for sale at a reasonable price with the newer Starbright XLT coatings, as they have about 10-15% greater light transmission than the TELEVUE – LIGHT-POLLUTED ASTRONOMY Posts about TeleVue written by Jon. The Mak comes with what’s called a red-dot finder. This is a small – and inexpensive – device that projects a small red dot onto a FEBRUARY 12, 2017: LET’S TALK ABOUT EYEPIECES, BABY Let's talk about all the good things, and the bad things, that may be. Let's talk about eyepieces! More to the point, let's talk about expensive eyepieces, also referred to as premium eyepieces. Obviously, as a preliminary matter, when you're selecting a new eyepiece, one of the first considerations should be how it fits in SEPTEMBER 28, 2018: THE BORTLE SCALE, OR WHY GAS IS YOUR Well, you can. The magic wand is your car, the magic word is gas, and the size of your scope “increases” because of much darker skies. The Bortle scale ends at 9, but let’s extrapolate a bit. Two years ago, back in Manhattan, my skies barely let me see Albireo, putting my NELM at magnitude 3.05. Every two Bortle skies is a full magnitude. AUGUST 11, 2018: DON’T BUY A 10-INCH DOB OVER AN 8 No, no, this isn’t yet another anti-dob rant; longtime readers will know that I actually do like dobs. No, this is more of a heads-up as to the differences between these two popular sizes of dobs, the 8 and the 10, and why, unless you’re a gym rat, you might not want to buy a 10-inch dob instead of an 8. (Note the word “might” there.) FEBRUARY 21, 2016: A NINE DOLLAR EYEPIECE? THE 23MM VITE After reading some very positive reviews about them in this Cloudy Nights thread, I decided to buy some super-duper-cheap eyepieces, for no other reason than to satisfy my curiosity about them. Well, and because I'm super-duper-cheap, too. These are the Vite aspheric 62-degree EPs, which cost just NINE BUCKS each. (These are also soldunder the
APRIL 14, 2017: THE DRAGONFLY TELEPHOTO ARRAY, GALACTIC Having moved to Denver last summer, I could not attend NEAF this past weekend as I had the previous two years. However, that didn't stop me from "attending" the lectures. Unlike previous years, where only select lectures were posted to Youtube a few months afterwards, NEAF live-streamed all of the lectures on both Saturday and LIGHT-POLLUTED ASTRONOMY Banner photo credit: Sarah Fisher, through a 127mm Mak Happy belated St. Patrick’s Day! Saturday night, the Denver Astronomical Society held its monthly Open House at Chamberlin Observatory. This is where the DAS invites members of the general public to come on out and look through the historic, 125-year-old 20-inch Alvan Clark refractor.LIMITING MAGNITUDE
March 9, 2018: Finally! A Clear But Cold Night at the Dark Site. On Wednesday night, after last month’s windy failure, I finally got a good night out at the DAS Dark Site. Well, half a night anyway, before I felt like a popsicle and packed it up and went home. I was out for three hours, but what a three hours! The afternoon was glorious inCLOUDY NIGHTS
December 21, 2015 – Electronically Assisted Astronomy, Cloudy Nights, and “Cloudy Nights”. Another of the “what I did last summer” items was to learn about the wonders of Electronically Assisted Astronomy. This is where you attach a video camera to thefocuser or
JANUARY 8, 2018: THE C9.25 OF MY DREAMS IS HERE! AND THE Well, I've finally done it! I've finally bought my long sought after Celestron 9.25-inch optical tube assembly (OTA). I had been very patient, waiting and waiting for a used one to come up for sale at a reasonable price with the newer Starbright XLT coatings, as they have about 10-15% greater light transmission than the TELEVUE – LIGHT-POLLUTED ASTRONOMY Posts about TeleVue written by Jon. The Mak comes with what’s called a red-dot finder. This is a small – and inexpensive – device that projects a small red dot onto a FEBRUARY 12, 2017: LET’S TALK ABOUT EYEPIECES, BABY Let's talk about all the good things, and the bad things, that may be. Let's talk about eyepieces! More to the point, let's talk about expensive eyepieces, also referred to as premium eyepieces. Obviously, as a preliminary matter, when you're selecting a new eyepiece, one of the first considerations should be how it fits in SEPTEMBER 28, 2018: THE BORTLE SCALE, OR WHY GAS IS YOUR Well, you can. The magic wand is your car, the magic word is gas, and the size of your scope “increases” because of much darker skies. The Bortle scale ends at 9, but let’s extrapolate a bit. Two years ago, back in Manhattan, my skies barely let me see Albireo, putting my NELM at magnitude 3.05. Every two Bortle skies is a full magnitude. AUGUST 11, 2018: DON’T BUY A 10-INCH DOB OVER AN 8 No, no, this isn’t yet another anti-dob rant; longtime readers will know that I actually do like dobs. No, this is more of a heads-up as to the differences between these two popular sizes of dobs, the 8 and the 10, and why, unless you’re a gym rat, you might not want to buy a 10-inch dob instead of an 8. (Note the word “might” there.) FEBRUARY 21, 2016: A NINE DOLLAR EYEPIECE? THE 23MM VITE After reading some very positive reviews about them in this Cloudy Nights thread, I decided to buy some super-duper-cheap eyepieces, for no other reason than to satisfy my curiosity about them. Well, and because I'm super-duper-cheap, too. These are the Vite aspheric 62-degree EPs, which cost just NINE BUCKS each. (These are also soldunder the
APRIL 14, 2017: THE DRAGONFLY TELEPHOTO ARRAY, GALACTIC Having moved to Denver last summer, I could not attend NEAF this past weekend as I had the previous two years. However, that didn't stop me from "attending" the lectures. Unlike previous years, where only select lectures were posted to Youtube a few months afterwards, NEAF live-streamed all of the lectures on both Saturday andLIMITING MAGNITUDE
March 9, 2018: Finally! A Clear But Cold Night at the Dark Site. On Wednesday night, after last month’s windy failure, I finally got a good night out at the DAS Dark Site. Well, half a night anyway, before I felt like a popsicle and packed it up and went home. I was out for three hours, but what a three hours! The afternoon was glorious in SLT MOUNT – LIGHT-POLLUTED ASTRONOMY July 27, 2018: Goto Telescopes / Mounts. So, let’s say you bought your first scope for around $150 to $300 – maybe it’s the Astronomers Without Borders One Sky scope, or one of its clones, like the Meade Lightbridge 130. Perhaps you’ve bought a refractor, like the Meade Infinity 102. CELESTRON - LIGHT-POLLUTED ASTRONOMY July 27, 2018: Goto Telescopes / Mounts. So, let’s say you bought your first scope for around $150 to $300 – maybe it’s the Astronomers Without Borders One Sky scope, or one of its clones, like the Meade Lightbridge 130. Perhaps you’ve bought a refractor, like the Meade Infinity 102. Or, it could be that you bought something likethe
MAKSUTOV – LIGHT-POLLUTED ASTRONOMY December 4, 2014: History of My Astronomizing, Part 2 – Getting the Mak. The Mak has a very different light path than a Newtonian. In a Newtonian, light enters from the top of the tube, reflects off of a primary parabolic mirror at the bottom of the tube, concentrating the light to a single point. JUNE 12, 2018: RMSS OBSERVING LISTS! Well, I'm getting super-psyched to be going to my first star party, the Rocky Mountain Star Stare, on Wednesday! My car is gonna be pretty full for the trip to sustain me for all 5 days. I've already packed all my astro stuff, my camping stuff, my clothes, books, and am now planning my meals. It'll LIGHT POLLUTION REDUCTION FILTER The same day as the Levenhuk/Baader solar filter arrived, another filter arrived, too: The Baader Moon and Skyglow Filter. Suh-weet! So, between the sun and the night sky, it was really a very full and enjoyable day and night of observing. NOVEMBER 18, 2018: MILE HIGH ASTRONOMY November 18, 2018: Mile High Astronomy. For me, it’s practically a dream come true – I am working in an astronomy store! A fellow DAS member, Sorin (like Cher and Madonna, he only has one name), has opened up a brand new telescope shop here in Denver, the only one for 500 miles in any direction. Denver has not had a dedicated astronomyFEBRUARY 27, 2015
February 27, 2015 – The 10mm Luminos Eyepiece and EOFB. Right at the same time as I got the Ultrablock, I also received my new Celestron Luminos 10mm eyepiece. I had ordered it in early February, using up the last of my Amazon gift card. For some reason, there was a two-week delay in getting it out to me, which is pretty unusual for Amazon. MAY 15, 2017: CELESTRON OR MEADE? PC OR MAC? Celestron pretty much discontinued the “non-XLT Starbright” coatings once they introduced the “Starbright XLT” coatings around 2003, so those older scopes are about 15 years old. In this vein, coatings do “evaporate” or otherwise “go away” over time. Not instantly, not to a huge degree, but they do, and less coatings meansless
MAY 31, 2017: THE ORION SIRIUS PRO AZ/EQ-G MOUNT, PART ONE All four of my Jeopardy shows have now aired, and those that watched them know that I won! Yes, I am now officially a Three-Time Jeopardy Champion, and you’d better believe that that phrase will come up right at the end of every discussion I’m ever involved in for the rest of my life. (I kid, I kid.) If you’d like to watch my shows, here are some links: LIGHT-POLLUTED ASTRONOMY Banner photo credit: Jon Greif Just a quick post about the Geminid meteor shower and Comet 46P/Wirtanen. Thursday night, December 13, we got out to the Denver Astronomical Society’s dark site, about 60miles east of town.
ORION SIRIUS PRO AZ/EQ-G Posts about Orion Sirius Pro AZ/EQ-G written by Jon. The three longtime readers of this blog might recognize the title of this post; I wrote another post about the shortcomings of my local observing site just short of two years ago, right after I moved into my apartment in Glendale, a tiny little independent city completely surrounded byDenver.
CLOUDY NIGHTS
When I got the Mak, I still had 3 eyepieces that I had used with my Bird-Jones scope – the 26mm and 9.7mm Meade 4000 Super Plossls that came stock with the scope, and a 4mm Celestron Omni Plossl that I had bought to get some high power out of the Bird-Jones.ORTHOSCOPIC
Inspired directly by Matt Wedel and his exact same post (hey, I never claimed to be clever or original), and inspired indirectly by a “show-and-tell” of my case I did recently for a brand new DAS member, I thought I’d do a “mini-review” of my non-scope astronomy equipment. TELEVUE – LIGHT-POLLUTED ASTRONOMY Posts about TeleVue written by Jon. The Mak comes with what’s called a red-dot finder. This is a small – and inexpensive – device that projects a small red dot onto a FEBRUARY 12, 2017: LET’S TALK ABOUT EYEPIECES, BABY Let's talk about all the good things, and the bad things, that may be. Let's talk about eyepieces! More to the point, let's talk about expensive eyepieces, also referred to as premium eyepieces. Obviously, as a preliminary matter, when you're selecting a new eyepiece, one of the first considerations should be how it fits inAPERTURA AD8
Because my plague of bad weather has now stretched on deep into a second month, I thought it would be a good time to take a look back at the past year – well, the past 14 months, actually – since I bought my Mak, and discuss both of my scopes, and my equipment with JANUARY 8, 2018: THE C9.25 OF MY DREAMS IS HERE! AND THE Well, I've finally done it! I've finally bought my long sought after Celestron 9.25-inch optical tube assembly (OTA). I had been very patient, waiting and waiting for a used one to come up for sale at a reasonable price with the newer Starbright XLT coatings, as they have about 10-15% greater light transmission than the SEPTEMBER 28, 2018: THE BORTLE SCALE, OR WHY GAS IS YOUR In my second-to-last blog post, I talked a lot about the Bortle Scale. What is it? Why should you care? Invented by John Bortle in a 2001 Sky & Telescope article, the Bortle Scale is an effective way for you to objectively assess the darkness – or, unfortunately, the brightness – of your sky, or any sky, with your naked eyes. The Bortle scale is amply described not only in his S&T article APRIL 14, 2017: THE DRAGONFLY TELEPHOTO ARRAY, GALACTIC Having moved to Denver last summer, I could not attend NEAF this past weekend as I had the previous two years. However, that didn't stop me from "attending" the lectures. Unlike previous years, where only select lectures were posted to Youtube a few months afterwards, NEAF live-streamed all of the lectures on both Saturday and LIGHT-POLLUTED ASTRONOMY Banner photo credit: Jon Greif Just a quick post about the Geminid meteor shower and Comet 46P/Wirtanen. Thursday night, December 13, we got out to the Denver Astronomical Society’s dark site, about 60miles east of town.
ORION SIRIUS PRO AZ/EQ-G Posts about Orion Sirius Pro AZ/EQ-G written by Jon. The three longtime readers of this blog might recognize the title of this post; I wrote another post about the shortcomings of my local observing site just short of two years ago, right after I moved into my apartment in Glendale, a tiny little independent city completely surrounded byDenver.
CLOUDY NIGHTS
When I got the Mak, I still had 3 eyepieces that I had used with my Bird-Jones scope – the 26mm and 9.7mm Meade 4000 Super Plossls that came stock with the scope, and a 4mm Celestron Omni Plossl that I had bought to get some high power out of the Bird-Jones.ORTHOSCOPIC
Inspired directly by Matt Wedel and his exact same post (hey, I never claimed to be clever or original), and inspired indirectly by a “show-and-tell” of my case I did recently for a brand new DAS member, I thought I’d do a “mini-review” of my non-scope astronomy equipment. TELEVUE – LIGHT-POLLUTED ASTRONOMY Posts about TeleVue written by Jon. The Mak comes with what’s called a red-dot finder. This is a small – and inexpensive – device that projects a small red dot onto a FEBRUARY 12, 2017: LET’S TALK ABOUT EYEPIECES, BABY Let's talk about all the good things, and the bad things, that may be. Let's talk about eyepieces! More to the point, let's talk about expensive eyepieces, also referred to as premium eyepieces. Obviously, as a preliminary matter, when you're selecting a new eyepiece, one of the first considerations should be how it fits inAPERTURA AD8
Because my plague of bad weather has now stretched on deep into a second month, I thought it would be a good time to take a look back at the past year – well, the past 14 months, actually – since I bought my Mak, and discuss both of my scopes, and my equipment with JANUARY 8, 2018: THE C9.25 OF MY DREAMS IS HERE! AND THE Well, I've finally done it! I've finally bought my long sought after Celestron 9.25-inch optical tube assembly (OTA). I had been very patient, waiting and waiting for a used one to come up for sale at a reasonable price with the newer Starbright XLT coatings, as they have about 10-15% greater light transmission than the SEPTEMBER 28, 2018: THE BORTLE SCALE, OR WHY GAS IS YOUR In my second-to-last blog post, I talked a lot about the Bortle Scale. What is it? Why should you care? Invented by John Bortle in a 2001 Sky & Telescope article, the Bortle Scale is an effective way for you to objectively assess the darkness – or, unfortunately, the brightness – of your sky, or any sky, with your naked eyes. The Bortle scale is amply described not only in his S&T article APRIL 14, 2017: THE DRAGONFLY TELEPHOTO ARRAY, GALACTIC Having moved to Denver last summer, I could not attend NEAF this past weekend as I had the previous two years. However, that didn't stop me from "attending" the lectures. Unlike previous years, where only select lectures were posted to Youtube a few months afterwards, NEAF live-streamed all of the lectures on both Saturday andORTHOSCOPIC
Inspired directly by Matt Wedel and his exact same post (hey, I never claimed to be clever or original), and inspired indirectly by a “show-and-tell” of my case I did recently for a brand new DAS member, I thought I’d do a “mini-review” of my non-scope astronomy equipment.LIMITING MAGNITUDE
Well, I’ve finally done it! I’ve finally bought my long sought after Celestron 9.25-inch optical tube assembly (OTA). I had been very patient, waiting and waiting for a used one to come up for sale at a reasonable price with the newer Starbright XLT coatings, as they have ORTHO – LIGHT-POLLUTED ASTRONOMY Inspired directly by Matt Wedel and his exact same post (hey, I never claimed to be clever or original), and inspired indirectly by a “show-and-tell” of my case I did recently for a brand new DAS member, I thought I’d do a “mini-review” of my non-scope astronomy equipment. DAS – LIGHT-POLLUTED ASTRONOMY Banner photo credit: Jon Greif Just a quick post about the Geminid meteor shower and Comet 46P/Wirtanen. Thursday night, December 13, we got out to the Denver Astronomical Society’s dark site, about 60miles east of town.
ULTRABLOCK – LIGHT-POLLUTED ASTRONOMY Well, I’ve finally done it! I’ve finally bought my long sought after Celestron 9.25-inch optical tube assembly (OTA). I had been very patient, waiting and waiting for a used one to come up for sale at a reasonable price with the newer Starbright XLT coatings, as they have JANUARY 8, 2018: THE C9.25 OF MY DREAMS IS HERE! AND THE Well, I've finally done it! I've finally bought my long sought after Celestron 9.25-inch optical tube assembly (OTA). I had been very patient, waiting and waiting for a used one to come up for sale at a reasonable price with the newer Starbright XLT coatings, as they have about 10-15% greater light transmission than theAPERTURA AD8
Because my plague of bad weather has now stretched on deep into a second month, I thought it would be a good time to take a look back at the past year – well, the past 14 months, actually – since I bought my Mak, and discuss both of my scopes, and my equipment with MAKSUTOV – LIGHT-POLLUTED ASTRONOMY Posts about Maksutov written by Jon. In my first time out with the scope since Moab in March (lame, yes I know), I got my first observing session with Jupiter for the season at 2am late Saturday night (technically, Sunday morning). CELESTRON LITHIUM POWERTANK I just flew in from the Rocky Mountain Star Stare in Gardner, CO, and boy are my arms tired. Ba-dum-bum. It was great! Well, except for the absolutely lousy stinking cloud-covered skies. JUNE 16, 2017: THE ORION SIRIUS PRO AZ/EQ-G MOUNT, PART Power problems solved! The Celestron Lithium Iron Phosphate Powertank (which I'll more fully describe below) puts out 3 amps, and powers this mount excellently. No more stutter-slew or stutter-track as I described in my last post. The mount just works great. Finally. But how well does this mount really work? I tested it two waysSkip to content
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MARCH 18, 2019: THE ONE BIG DRAWBACK TO WORKING AT A TELESCOPE STORE Banner photo credit: Sarah Fisher, through a 127mm Mak Happy belated St. Patrick’s Day! Saturday night, the Denver Astronomical Society held its monthly Open House at Chamberlin Observatory. This is where the DAS invites members of the general public to come on out and look through the historic, 125-year-old 20-inch Alvan Clark refractor.They can
Read More March 18, 2019: The One Big Drawback to Working at aTelescope Store
MARCH 3, 2019: WHY YOU SHOULD STAY FAR, FAR AWAY FROM THAT $100 TO$150 TELESCOPE
Many beginners interested in getting their first scope will often ask about getting one for about $100 to $150 or so. Buying a scope in this price range is a mistake. A big mistake. Scopes in this price range are so bad that they can frustrate you right out of the hobby.To explain why,
Read More March 3, 2019: Why You Should Stay Far, FAR Away From That $100 to $150 Telescope FEBRUARY 1, 2019: H-ALPHA SOLAR OBSERVING One of the very nice benefits of working in a telescope shop is, of course, that you get to play with all the telescopes. There’s no better way to learn about a scope than to physically put it together, set it up, and then point it out the front window of the shop and look Read More February 1, 2019: H-alpha Solar Observing JANUARY 21, 2019: LUNAR ECLIPSE! Banner photo credit: Meeeeeee!!!! What, you were expecting me to rant about the “Stupidmoon” all over again? Yeah, I’ve ranted and raved about all these stupid names that the media keeps applying to lunar eclipses – which I refuse to repeat here. But just like Ryan O’Neal was forced to do by a relentless Barbra Read More January 21, 2019: Lunar Eclipse! JANUARY 10, 2019: TELESCOPES ARE LIKE SHOES – ONE SCOPE CAN’T DOIT ALL
“Okay, now WTH is he talking about?” It’s an analogy I use to explain the differences between different scopes, and why there’s no one perfect scope that does it all. You have different shoes for different purposes: sneakers, dress shoes, boots, slippers. Yes, even Crocs. They each serve their purpose, and you don’t wear one Read More January 10, 2019: Telescopes Are Like Shoes – One ScopeCan’t Do It All
DECEMBER 17, 2018: HOLY GEMINIDS! AND COMET 46P/WOMPWOMP Banner photo credit: Jon Greif Just a quick post about the Geminid meteor shower and Comet 46P/Wirtanen. Thursday night, December 13, we got out to the Denver Astronomical Society’s dark site, about 60 miles east of town. Thursday was the peak night of the shower. It was actually cloudy when we left, but the forecast Read More December 17, 2018: Holy Geminids! and Comet 46P/Wompwomp DECEMBER 12, 2018: ORION SIRIUS PRO AZ-EQ/G, PART III –CUSTOMER SERVICE
Part three? What happened to part one and part two? Oh, there they are. The tl;dr version of those posts from last year is first that I had the wrong power supply for this mount, and then when I got the right power supply, the mount worked very well with my little 8-poundMak on
Read More December 12, 2018: Orion Sirius Pro AZ-EQ/G, Part III –Customer Service
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