The zodiacal light was *very* prominent a couple of mornings ago. After noticing it, the following day I read up on the phenomena and found that zodiacal light...

The ballad of Bobby Ricky.

A few days ago the President signed legislation which, among other things, amended existing law to define the U.S. time zones in terms of UTC instead of mean...

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Is there such a thing as an astroscope with zoom? To minimise shake the zoom would have to be on a decoupled wheel (preferred) or electric. It would be a great...

I'm going to be taking a trip to Florida in a few weeks and have a nice little setup that I think I can bring as a "carry on" on a plane. Rather than bother...

Off and on over the years I've thought about adding a zoom eyepiece to my eyepiece box, but I've never taken the leap. What kind of experiences have others...

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Hi anyone used this lens for astrophotography? Opinions? Is it usable at F4 or does it need to be stopped down more? Thanks...

Titles in Mathematics, Advanced Engineering Mathematics, Discrete and Combinatorial Mathematics, Mathematical Economics, Mathematical Analysis for Business,...

l,poj

Not yet, but soon. It's in alpha revisions right now. But I thought I'd give a preview: http://astro.isi.edu/pleiadatlas/debug/ Among the exciting new...

I am selling the World of Dahlias Windows Slideshow v1.0 for $10.00 each. Makes a good gift for non astronomers who have a computer and for the cold winter...

Astronomers involved in the precise timing of astronomical events on video will find the precision GPS video time inserter available...

Astronomers involved in the precise timing of astronomical events on video will find the precision GPS video time inserter available...

FS: 35 years worth of Sky & Telescope magazine - issues from 1966 onwards through to 2001. A few (i.e. less than half-a-dozen) issues missing, mainly from 1999...

Think Astronomy has just released version 1.4 of the "Where is M13?" application. "Where is M13?" helps you develop a 3-D understanding of the Galaxy and...

I would like to announce a freeware program I've just released called "Where Is M13?". It's a simple application that displays the Messier objects in their...