Or you can subscribe to get free e-mail notifications of NASA's latest science headlines at http://www.spacescience.com/news/subscribe.htm.
If you prefer to search for specific information from NASA, you can search all NASA Internet sites from a single location at http://www.nasa.gov/search.
NASA images links are at http://www.nasa.gov/gallery/photo/index.html
More space and astronomy links are at http://www.mmdtkw.org/sciast.html.