New Articles in [!monthname!] Archives
Closing a Can of Worms: Eliminating Periodic Error
Apr 21 2012 01:35 AM |
sfruhl
in New Articles in [!monthname!]
Converting your telescope's RA drive from an open control system to a closed control system can eliminate the need for PEC.
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Author name:
Stephen Ruhl
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Binocular Universe: Here’s the Poop
Mar 06 2012 12:59 PM |
PhilH
in New Articles in [!monthname!]
If you look at an old star map of the late winter sky created 250 or more years ago, you'll find a huge, unfamiliar constellation dominating the sky to the south and east of Canis Major. That's Argo Navis, a behemoth of a constellation dating from ancient Greece that depicted the mythical voyage of Jason and the Argonauts as they searched for the Golden Fleece.
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Author name:
Phil Harrington
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The Botswana Solstice Machine
Feb 16 2012 01:14 AM |
Guest
in New Articles in [!monthname!]
Whilst driving through the Tropic of Capricorn, 140 km north of Gaborone in Botswana, I stopped one day to look at the curious structure by the side of the road and was pleased to find it was a Solstice Machine.
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Author name:
Carl Dori
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Binocular Universe: Aurigan Treasures
Feb 11 2012 11:52 AM |
PhilH
in New Articles in [!monthname!]
Head outside this evening and take a look high overhead. If you live in midnorthern latitudes, you will find a lone beacon cresting near the zenith as the sky darkens. That's Capella, the Alpha star of the constellation Auriga the Charioteer.
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Author name:
Phil Harrington
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February 2012 Skies
Feb 04 2012 12:25 AM |
Guest
in New Articles in [!monthname!]
Highlights: Comet Journal, Martian Landers, Meteor Showers, Fat Tuesday, Leap Day, Planet Plotting, February Moon. Focus Constellations: Cassiopeia, Cepheus, Draco, Ursa Minor, Ursa Major, Lynx, Cancer, Gemini, Orion, Auriga, Taurus, Camelopardalis, Perseus.
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Author name:
Dick Cookman
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50 More CN Signatures - for 2011
Jan 04 2012 01:10 PM |
Terrance
in New Articles in [!monthname!]
As in last year’s article, all entries are from actual CN signatures.
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Author name:
Terrance Hannan
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Astronomy Power Box Project
Dec 07 2011 12:01 PM |
antimorris
in New Articles in [!monthname!]
All in all, a relatively simple build once all the wiring plan was created and design was completed beforehand. I now have a long-lasting, durable power box with room to expand if needed although with a 140Ah deep cycle battery at its heart, that should not be necessary anytime soon.
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Author name:
Anna Morris
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Luminosity of Telescopes
Dec 06 2011 12:36 PM |
Rafael
in New Articles in [!monthname!]
The luminosity of a telescope, I. e., the brightness of its visual field, can be mathematically defined by the ratio between the light flux reaching the eye when the observer looks through the telescope and the light flux reaching the naked eye from the same target.
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Rafael Chamón Cobos
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My Simple Aluminum Dobsonian Telescope
Dec 05 2011 12:29 PM |
davidspixx
in New Articles in [!monthname!]
To simplify my dilemma, the scope needed to be portable, quick to set up, cheap; and oh yes, and I wanted it to track the stars. Sadly, I have no machine shop at my disposal, but, and there is a big but (no pun intended), I had more time than money.
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Author name:
David Shouldice
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What's Wrong with the Celestron CGEM Mount?
Dec 04 2011 10:02 AM |
Guest
in New Articles in [!monthname!]
This is not so much a review of the CGEM as a detailed analysis of a problem related to guided astro-photography and only seen in some samples of the CGEM. A visual user would never encounter this problem at all.
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Author name:
Greg Marshall
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Open Source, Easy "HDR"
Sep 21 2011 01:07 PM |
daev
in New Articles in [!monthname!]
The HDR is in quotes because it's not real HDR; I don't think there's any stacking of info into an expanded color depth in what I'm about to describe.
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Author name:
Dave Hensley
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Cleaning and Modifying the C11 Beast - Part 1: Removing the Corrector Plate
Nov 28 2010 03:17 AM |
ChiAstroJoe
in New Articles in [!monthname!]
This article is part 1 in the How-To series “C11 Cleaning & Modification”.
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Author name:
Joe Guzman
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Cleaning and Modifying the C11 Beast - Part 5: More Grab and control handles
Nov 28 2010 03:23 AM |
ChiAstroJoe
in New Articles in [!monthname!]
This article is part 5 in the How-To series “C11 Cleaning & Modification”.
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Author name:
Joe Guzman
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Inexpensive 2” housing for 1.25” eyepieces with SurPlus Shed Item L3890D
Jun 17 2010 11:43 AM |
Jack Thomas
in New Articles in [!monthname!]
Here's a way to inexpensively and semi-permanently house 1¼” eyepieces in two inch housings that can be sourced from Surplus Shed.
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Author name:
Jack Thomas
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Eyepieces & Choosing an Eyepiece Set
Mar 13 2005 04:39 PM |
JayKSC
in New Articles in [!monthname!]
Coming in all sizes, shapes, and prices, the shear variety of oculars in today's amateur astronomy market may make the selection of a good set quite difficult. Eventually, many observers end up with a vast number of eyepieces, but trimming down the fat in your eyepiece case can really add to your observing experiences and ease of setup for a night under the stars. The choosing of proper eyepieces is nearly as important as the choosing of a telescope; for a set of well selected oculars may make the difference between seeing or not seeing the vague polar caps on Mars or detecting faint wisps of a dim deep sky treasure. Mastering Magnification
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Author name:
Jay Michaels
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