Space Program Metanode
This node links to space missions which are either terminated, operating currently, in development, or being studied by NASA, the ESA, and a number of other space programs around the world. The primary goal of each mission is listed in parentheses. Most of this information is available at NASA's website at www.nasa.gov, but I've found that, while they are extremely skilled at designing space missions, NASA and ESA engineers are piss-poor web designers. So, unless you're really interested in the exact redshift range viewed by the GALEX instrumentation, this is your one-stop shop for information on the space program.