[Friday, December 5, 2008] Magnetic substorms on Earth disrupt orbiting satellites, including telecommunication satellites and global positioning systems.

[Friday, December 12, 2008] One of the moons in our solar system that scientists think has the potential to harbor life may have a far more dynamic ocean than previously thought.

[Saturday, December 20, 2008] NASA's Hubble Space Telescope has caught Jupiter's moon Ganymede playing a game of "peek-a-boo." In this crisp Hubble image, Ganymede is shown just before it ducks behind the giant planet.