The Essential Guide to Astronomy
Sky & Telescope senior editor Alan MacRobert has been covering all aspects of astronomy since 1982.
Astronomy & Observing News
After successfully settling into orbit around the Red Planet, NASA's Mars Odyssey has begin its 2½-year mapping mission.
By: Alan MacRobert
July 23, 2003
A spiral galaxy's arms trail behind when it rotates, right? Not always.
The cosmic chess piece, the Horsehead Nebula, is seen in all its glory through the eyes of the VLT.
The lunar surface consists of more than just craters and mare. Here's a guide to some of the other lunar features.