Hi, I'd like to image the upcoming Moon/Jupiter occultation and I'm trying to come up with a focal length that will give me a small enough image scale to allow...

It occurs to me that the astronomers are to the Hawaiians as light pollution control advocates (amateur astronomers) are to governments. Our requirements from...

http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&category=3636&item=6129083391&rd=1

Is it true that these devices (used in solar scopes) are flat to 1/100th wave?

Here's a quote for 3, 20cm etalons, without the prefilters of course. Three 20cm etalons……………………$ 834,000 A bit higher cost than the 8" SCTs.

Today when I picked up the base of my dob, the screws I had put in to hold it together came out as if they where not there at all. I also found the center bolt...

A dust devil cleaned the solar panels? A Martian hand probably cleaned them off to get a reflection to adjust it's hat. I assume the mystery power boost isn't...

Looks like the Skywatcher will be about $50 less than the Orion and it's the identical scope. However, I was advised by one retailer that the Orion carries...

There's a Coulter on Astromart that I'm considering---want more aperture...it's that 13.1" purple beast.... Can anyone give any caveats to this? Advice? The...

Hi All: Just in case anyone was still wondering when the new edition of Rukl's "Atlas of the Moon" would be available, the answer is now! The shipment just...

I recently bought a Meade LX5 2080 built around 1989 it has a "Multi Coated Optics Group" placard on the back, the primary and secondary mirrors seem to be...

Clouds ruined my ability to capture Venus and Jupiter on the 4th and 5th and the forcast is bad for the 6th too. They would have been in the same field on the...

Some of you do color photography during meteor showers. If you have recorded color photographs of meteors from slow velocity meteors, less than 40 lm/sec...

Hi, I am considering buying a LXD75 SN8 or SC8. According to Meade, the max magnification of the SN8 is 500x, of the SC8 it is 600x. Question: how on earth do...

Hi, I am searching for educational purposes a short video (avi, mpeg) showing the Galileo experience (dropping of a hammer and a feather) conducted...

4th November: Conditions were not very good this morning with a big ring around the Moon and lots of thick cloud. A few gaps did meander their way into the...

Hi, Has someone an AVI or MPEG copy of the Galileo experience (dropping of a hammer and a feather) conducted by astronaut David Scott in 1971 on the...

Hi, Has someone an AVI or MPEG copy of the Galileo experience (dropping of a hammer and a feather) conducted by astronaut David Scott in 1971 on the...

I got the following e-mail today, anyone out there about to help?? ------------------------------------------------------------------ From:...

There have been a series of events on the sun on November 3, 4, and 5th. The shocks from these events are combining to reach Earth beginning in the next 12...