When people look through my 5" APO refractor, they tend to perform a series of tests. They make comments I don't understand. They put it out of focus and talk...

Where are all the closeup pics in H-alpha of the the latest monster sunspot sculking across the sun's disc? It is quite a sight at any power. I even saw...

Hi, AAVSO requests the help of amateur radio to monitore Sudden Ionospheric Disturbances, aka SID in low bands Extract from my website. When the Sun release a...

I've been asked about a problem with PleiadAtlas, running on PalmOS 5.0 and up, that I'm unable to reproduce on any of my simulators. Specifically, the...

i am fairly new to astronomy, and a absolute amateur to astrophotography, but managed to get the bug and now have all the basic stuff, ie: scope, olympus om-1,...

Hi all. The latest forecasts from SEC and STD predict that the CMEs from yesterdays X-flares may arrive sometime in the next 12 hours. It may be that they may...

Does anyone know where I can buy, and have shipped to the U.S., the Spanish-language version of H. A. Rey's book "The Stars" ?

On Friday night Tony Donnangelo, Bob Pody, John Symborski, and I successfully observed the periodic comet 2P/Encke through a 14.5" Starmaster SkyTracker Dob...

Mare Orientale is one of the most impressive features on the moon, a tremendous multi-ring imact basin. Unfortunately it is right on the limb where we...

I've posted a photo of the sunspot cluster that is responsible for this afternoon's (Friday, October 24, 2003) coronal mass ejection. It's...

NOVEMBER 12: 8:00PM at the NY Institute of Technology Presented by the Astronomical Society of Long Island and the Optical Society of Long Island Dr. H. John...

Rod Mollise has a valuable review of binoviewers in the current issue of Amateur Astronomy (#40, Winter 2003). I feel I understand the pros and cons of these...

Well, I got a reply from Starry Night after waiting three days. Guess what!? The "UPGRADE" to enthusiast has NO PLANNER. So, I was hoping to be able to...

Last night former Astronomical Society of Harrisburg member Bob Naeye (see http://www.melitatrips.com/bio_naeye.html for a biography) gave an extremely...

I was bought a Paralux Astro telescope from France as a present. ( I made the mistake of saying I always wanted a telescope!) Now that I have got one, because...

I'm looking for anyone with experience using a longer FL like a Pentax XL 40mm in a Celestron C5+ (125mm, F/10). I am thinking of expanding my EP collection...

Dear Fellow Astronomy Enthusiast, This is just too good a program to go unmentioned...so I'm mentioning it! OK, for now. Everyone go back to what they were...

After reading Sky and Telescope's discussion of deep-sky imaging with these cameras, I wondered if one could use light pollution rejection filters in...

Dear friends, You may be interested to read the article about sidewalk astronomy in Hong Kong and the star party held in mainland China, which is now on S&T...