"A web site for the astronomically disadvantaged", as its author says!
One of the references in the astronomy world
Astronomy and Science.
The french magazine about astronomy
A free planetarium software for windows, mac and linux. Choose "Mars" as a landscape background if you want to know how it looks like at Chajnantor.
ScienceDaily is one of the Internet’s most popular science news web sites. Since starting in 1995, the award-winning site has earned the loyalty of students, researchers, healthcare professionals, government agencies, educators and the general public around the world.
Space News, Articles, and Information from Scientific American
Visually not the most attractive but very up-to-date.