Hallo, I have advertised on InfoRelation.com some project connetcted with the subject of our discussion list (you will find that project by...

I have a couple questions, they all related to the future of spece telescopes: 1. Hubble's Telescope has 0.1 arcsec resolution in visible and ultraviolet...

Hello all, Can a Raytracing software program also evaluate Contrast on (telescope) images? What are the existing softwares that can evaluate Contrast? How...

TeleVue has more or less been the only ones using this for apos, with the other makers doing only full size lenses and no sub-diameter lenses. I think the...

Anyone got a clue if I can install the CG5-GT motors (and covers) on a Vixen GP? The mounts are nearly identical, so I figure I should be...

I notice that Baader has come out with this filter. Any good? Eric

Nice clear skies here so tried hunting down DSOs (towards the North to avoid the Moon). Few minutes later low cloud starts rolling in towards the North, so...

The time is ripe for me to upgrade my 20 year old, short eye-relief 20x80s in favor of more powerful, larger aperture binoculars with longer eye-relief. Orion...

Got up this AM, moved Babylon 8 to the rear of my trailer and viewed Jupiter, Venus, even Mars, put the scope back and got back inside to unfreeze myself, I...

Eye give up, I just can't seem to see a thing. You'd almost think they forgot to put a primary mirror in the darned scope and put the finder on backwards...

N. Foldager wrote: Hi, In the seventies, it was announced that one of the Apollo Service Modules (I don't remember which) would perform a burn in front...

Does anyone know of a way to tell if an objective has been polished well by say looking at a bright star?

I recently purchased an Orion XT8 Dobsonian Reflector which came with a copy of Orion's very impressive The Sky software. Being relatively new to astronomy I...

At what magnification should I be able to see the platerlets with an 80mm F 7.5 refractor?

Just seen excellent first time telescope buyers advice on this on the MSNBC web-site. http://msnbc.msn.com/id/6590620/ Good to see this in the main-stream...

I have discoverd that the Celestron ED80 is not a good buy. The focuser is too short a travel to allow prime focus photography unless you can get a longer...

Greetings Starry Night Enthusiast is showing Comet Machholtz as a very prominent night sky object with a dramatic tail. I couldn't even find the thing last...

How about the spot diagrams for the TMB 100mm f8 posted on the TMB apo group? It looks like this scope could be a kind of benchmark since it keeps the colours...

Hi all, We're looking at both the Orion Star Blast and the Orion XT6. As to criteria that led us to these two units: We've ruled out terrestrial use, as for...

I just now got the Celestial Wonders 2005 Calendar from Sky & Telescope and it is a BAD A** calendar!. The pics are awesome but what I am really drooling over...