Is the color error in a barlowed F5 crown/flint achromat (eff. F10) the same as an actual F10 crown/flint doublet? Trying to decide between an F5 achromat...

Observing from 45.19 N, 90.44 W--nearly exact center of northern half of western hemisphere. Northern Wisconsin. Approximately 11:55 CDT aurora observed...

Nice triple prom coming around east limb - pic at http://home.freeuk.com/m.gavin/pstnew.htm with couple of proms on west limb. Disk activity moderate with...

Hello guys! Well I am finally healthy and the weather was super nice these days. Anyhow I had a chance to take out my XT8 last night and this is what I...

http://www.spaceref.com/news/viewpr.html?pid=17676 all that dust raining down upon us for all that time before.

I attended my first amateur astronomy club meeting today, and it's pretty unanimous that one should start with good binoculars. So, I heard specs like 7x50,...

This is a very casual report. But most of my observing now is casual... Date: Friday evening, 26-Aug-2005 Location: Cottonwood Spring, Joshua Tree...

I dusted off my old 50mm f/12 Tasco table top refractor in preparation of having my 5 year old daughter "use" it at this years Black Forest star party. I only...

Hi, If you are looking for 3D rendering of celestial bodies to illustrate articles of your website or e-magazine, I suggest you to look at my new art gallery...

Is Rod Moll. gearing up for another? http://www.msnbc.msn.com/id/7845030

Is anyone else not getting email posts from Yahoo groups? I've not=20 received a single email from any of the astro groups i'm a member=20 of since Friday...

What happened to sci.astro.amateur? It looks like its degraded, just like RTMC. There are a bunch of astronomy groups on Yahoo! Groups. Are the...

"A beer, Tom. You know. A brew. Oat soda. Suds. I don't have any tendrils to open things with anymore. And just because I'm a dog doesn't mean I couldn' t use...

Had a nice evening, not lots of people but those that did show up where nice. One younger lady who looked like she was about 1/2 my age and dressed like she...

I know it's important to cool down scopes to reduce tube currents when going from a warm environment to a colder one, but what about in the opposite situation?...

Hi, anyone had any experience with these? Do they track well? Are they a good value for the money? Thanks, Chuck

I was pleasantly surprised this morning to observe Mars in a bright blue sky. I've never seen that before. About 15 minutes before sunrise, the sky was...

They'll probably not light all 90 candles on his cake, as that would run the risk of an illegal bonfire and spoil everyone's night vision. Instead, the local...

I really should call their support...but I try to save that as last resorts. =) My StarryNight 5 has an odd display problem, in the tool bar where zoom and the...

I take back all those nasty things I said about the East Coast summer. We had a mag 5+ sky last night (seemed like mag 12)! Practically no sky glow over...