Pluto hasn't been having a good summer. Astronomers decided last month that it doesn't really qualify as a full-fledged planet. Now it's considered a dwarf planet. A first-grade class at The Fay ...

Outer Planets Program. NASA delayed the Europa orbiter — from a 2004 launch to 2006 or 2007 — because of technical concerns. The Europa orbiter requires new technology for power and radiation-hard ...