The geocentric astronomers since the time of the Greeks observed that while the Sun appeared to travel through the background stars directly, all planets would...

The Dark Side of the Moon explained in ten seconds http://www.youtube.com/watch?v=7mb3AQmhTKo

The word, "threadbare" comes to mind. There are no constraints to images on websites, not like old newspapers and magazines. Yet, some still serve-up images...

Gents, I apologize for the forthcoming spamming by our favourite twisted puppy here on s.a.a. but I should have a retrograde result available this year and...

Myth 1 - Daylight and darkness is exactly 12 hours across the globe - "Don't let any miserable weather fool you: 20 March marks the spring equinox, also known...

INTERNATIONAL EARTH ROTATION AND REFERENCE SYSTEMS SERVICE (IERS) SERVICE INTERNATIONAL DE LA ROTATION TERRESTRE ET DES SYSTEMES DE REFERENCE SERVICE...

Summer is the time to explore the Milky Way, with its mired of stars and deep sky objects. Throughout the Milky Way there is a background of elemental hydrogen...

On Saturday, January 13, 2001 at 10:30:44 AM UTC-5, wrote: Based on comments by Bill Burnett, (an Intes Dealer), I was leaning toward...

A while ago one of the contributors, with the appropriate pseudo-authority of an echo chamber, announced that mathematical voodoo is more relevant than normal...

Even after the analemma has been exposed as a disruptive exercise insofar as it introduces the idea of a wandering Sun into the same arena as the true...

And here again in the last few days we have Oriel talking AT somebody. But then "he" is a just bot with just a tiny amount of human intervention. Indeed the...

On my web site at http://www.quadibloc.com/science/cal03.htm I have made a minor addition under the subheading "Another Compromise". If it is assumed that a...

Curiosity has landed and is alive! -- -Sam Wormley

Can anyone tell me what can be seen from New York City with a 4.5" telescope? And can more be seen with an 8" one?

I'm in Waterloo, New York, at approximately 42° 45' N; 76° 54' W. That's about half way between Syracuse and Rochester. At 12:31 a.m. this morning, almost due...

Hi all, Has anyone here used a Televue 3-6mm Zoom in an f4.5 dob? I have a 13.1" f4.5. The zoom would give me a magnification range between about 250x and...

Mike Simmons wrote, in part: Though it's still somewhat of a work in progress I'd like to announce a new web site for Mount Wilson Observatory for those...

I am relatively new at this (astronomy and newsgroups) and have been exploring what I can with an 8" SkyViewPro. I have been learning a good bit just...

US$1.99! Almost as much as a gallon of gasoline. I know i've bought it from that same store in the past for less than half that price. Question is, would i...

How do you measure sky brightness in magnitudes per square arcsecond (MPSA)? Is there some way to relate this measurement to the more typical zenith limiting...