I have just finished grinding, polishing, and figuring an 8" mirror of approximately 54.5" focal length (an f/6.8). I don't have a lot of experience with...

Hi, Who could identify the astronaut and the mission ? http://www.astrosurf.org/luxorion/Sciences/astronaute-helmet-closeup.jpg Thanks you Thierry-

Hi, Your opinion 'd be welcome. There is a French magazine titled "L'internaute magazine" (magazine of internet users) that provides for a while a poll...

Hi, As webmaster of Luxorion project, I 'ld like to enter in relation with a Royal Astronomical Society fellow (UK) knowing and having read some pages of my...

Hi, I don't know when they changed, recently, but JPL Ephermerides generator changed of look and URL http://ssd.jpl.nasa.gov/horizons.cgi Have a night...

Hi, It is off-subject of amateur astronomy, but I don't find any other website better suited where I can post this msg. Sorry. I am currently working on a...

Hi, Soon there will be probably 12 planets in the solar system ! ercury, Venus, Earth, Mars, Ceres, Jupiter, Saturn, Uranus, Neptune, Pluto, Charon and 2003...

Hi, I am searching any user of the software STD SWIM for advice and availability of data for 1986 prior any purchase http://www.spacew.com/swim/ You can also...

Hi, Has someone, lost in his archive or deep in his drawer, a picture of any sunspot, active region Ha, M-class X-flare or of the sun disk pictured close or...

Hi, I come with an old story but who knows... Could someone tell me is there was an ionospheric disturbance or even auroras in the vicinity of belarus and...

FYI. Cloudy Nights Telescope Reviews just released an ads. Just released : "Where is M13", a new software displaysing location of DSO in...

Currently as a bit of a space fantic I have spent a great deal of time reseaching space colony technoloies and ideas. As well the technologies to get us there....

Two crashing galaxies may have shot out a "supermassive" black hole that is soaring through space, some astronomers...

I have an 8" Celestron SCT w/ Starbright XLT coatings, and am considering upgrading to an 11" Celestron SCT w/ Starbright XLT coatings. While I have looked...

This is a new ccd color camera. I just purchased this about 3 weeks ago online. I only used it for about 45 minutes. I am selling it because I do not want a...

I'm going to be sending my newly polished mirror out for coating shortly, and I wanted to get some feedback from the group about the parts I'm planning on...

I want to add an axis brake on one of my dob mounts. Does anyone have a link to instructions for making one similar to the one on the Orion XT series. Reed