I'm reading "Telescope Optics" by Rutten & van Venrooij and have some questions. First the observation that the authors appear wildly inconsistent about what...

How does overall design of an OTA affect performance? Can you have a top quality ED objective with a medium standard 3 or 4 baffled system and still get...

Any experiences with Celestron Advanced Series C8-NGT Newtonian Reflector that you want to share. thanks nvega

NOTE: USA and CANADA Customers are eligible Sunday June 20th, 2004 so don't miss your chance (see country schedule below) Announcing the Deepsky Software...

Just wondered if i should buy the Orion 80mm ED, i'm kinda bored and would like a new scope to play around with. I have a CG-5 to mount it on, guess for...

At approximatly 8:30 p.m. this Friday evening, the Spitz A3p projector at the Mount San Antonio College Planetarium performed a final bow to the audience and...

Hi all, I've got a Megrez 80 and it is a thing of beauty, built like a tank, but the objective is typical of short tube 80's. Does anyone know of a...

FOR RELEASE: June 17, 2004 NEWS NUGGET NO.: STScI-NN040617 A REALLY NEAT CLOSE-UP OF COMET NEAT FROM KITT PEAK OBSERVATORY This image of comet C/2001 Q4...

If not you still have plenty of time.... When i read up on stars one thing i find interesting is the rate at which different stars consume their fuel. You...

Ok - probably a VERY dumb question here...but I'm new so please forgive the ignorance... I've got my ETX-90 connected to a laptop with Autostar Suite running...

Hi, I currently have a Meade LX-90, but even with the 3.3 focal reducer, the focal length is too much to give me wide fields of view - so I am looking for a...

Interesting reports on the black-drop from yesterday's transit. Some saw it while other's didn't. So is it real? Well, nothing happens to create this effect...

http://opticsplanet.net/pentax-eyepiece-xo-20.html

Discovery magazine seems to be advocating the building of the Space Elevator and dumping the Shuttle. http://www.discover.com/issues/jul-04/cover/

Is there some good reference stars to determine how well my refractor performs in terms of how many stars I should see under good seeing? For instance I am...

A blatant rip off but I like it. How many sci.astro.amateur posters does it take to change a light bulb? 1 to change the light bulb and to post that the...

Is it possible for Venus and Mercury to be transiting the sun at the same time? Assuming the two orbits are independent of each other, it should occur (though...

Yesterday I received an error-message of a SMTP-server of a large US-provider that contained a mail with my e-mail-address as sender address I never...

Hello everyone, I wanted to experiment with parallel programming for pcs. And I was wondering if there was a problem dealing with astronomy that I can...

Henry Spencer wrote: One might as well wonder why Americans persist in celebrating on the 4th of July, when the US realistically...