Just a quick note to let you know that registration for the Cherry Springs Star Party (being held June 2-6) closes tomorrow, April 30. You can pay online via...

There has been debate here for a long time over what kind of telescope is the best overall. Optical design, portability, suitability for photography, ease of...

Hi, I would be grateful if someone could identify any of the craters (or any other features) in my image. I'd look to look up the area on a lunar atlas so I...

Please feel free to click: - full online version of the book NEW TRENDS IN PHYSICS - Spheres in nuclei - images of all the spheres in nuclei on internet on...

Why would some one spend $2000 for a 6" f/5 Newt telescope, when a 4" APO can cost less than...

Hi group. Celestron C9.25 OTA I see these listed by retailers as f/10 and others as f/11----are there different models? Company 7 shows it as f/10 and...

Anyone have any input on the Texas Hill Country area around Marble Falls being good, bad, or ugly for astronomy? Is Enchanted Rock the closest "Clear Sky...

-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Anyone here have pointers to sources for knurled-head screws? I have a couple of scopes/mounts which have lost...

"Aidan" wrote in : DJM, In your smear campain against the search engine...

How should I plan my astrophotos to best match that detector in a CCD or digital camera? I understand that I should match the focal length to the detector...

Usenet is certainly the land of the free and home of the strange: An odd pattern has emerged... The following posters all 1.) Post from the same earthlink...

Anyone know where I can get a text listing of the star catalogue built-into an Orion Skywizard 3? I may be using an Orion Skywizard 3 separately from an...

The stuff I read says they match well enough for small mirrors that it doesn't matter which you use - but this is for a comparison of two mirrors each centred...

The Moon landing never happened. It was a hoax and was motivated by religion. This was psychological and religious weapon of mass destruction...

Review: Orion 25x100 Binoculars (Part 3 of 3) Focusing: Each eyepiece focuses individually. It takes a bit of force to make the initial turn to focus each...

First the moon landings happened. If you don't believe it you're an idiot. Second everyone who posts complaining about trolls is an idiot. Don't you realize...

In sci.space.policy Jim Oberg wrote: 'Sedna' is just first in another newly approved list of 'flying mountains' (an old term...

The FC-60 and FC-100 are composed of uncoated flourite doublet with the second lens coated (at the front). How does this affect performance when used on very...

Here's some shots through the new version of the TeleVue 60: http://televue.com/engine/page.asp?ID=257 I realize Jim Burnell is quite skilled, but still,...

HUBBLE WEBCAST ANNOUNCEMENT: The following event at the Space Telescope Science Institute will be webcast live. Those watching the live webcast will be able...