There are a lot of space websites out there. Here are a couple that I hit often.
Websites I like and recommend
Rand Simberg's Transterrestrial Musings
Rand Simberg describes himself as a recovering aerospace engineer, a term that I find to be pretty amusing as someone who
hasn't accepted that he has a problem with aerospace engineering yet (well, I know that there are problems, but...). This
site, not just about space, is Rand's weblog, where he posts thoughts about developing our space effort and other items that
occur to him. If you think that NASA is the answer to all your space-prayers, and aren't interested in seeing information
that may make you think otherwise, this site is not for you.
The Mars Society
This is the primary website for the Mars Society, although there are others that are affiliated (newmars.com and the like).
As the primary site, it's where one should go regularly to find out what's going on with the society. In the last year or
so, I've found their updates to be sporadic and not very useful, however.
An excellent collection of space-related material that covers, for the most part activities that people are doing on their
own or in small groups. Some sample areas include simulators, hobby satellites, and a somewhat-daily update of space news,
focused more on alternate space (the X-prize, start-up companies, etc.) than on "big" space, although you'll get
some good info and insight on that as well.
The Space Review
Updated on Mondays, thespacereview.com typically posts 3 articles about space topics. Jeff Foust, the editor, is looking
for contributed material all the time. If you want to get started writing for the web, this may be a good place to start.