This article discusses the history and future of planetary-protection restrictions. It begins by addressing the difficulty of discovering (possibly rare) life elsewhere, and then describes the potential difficulties of...

This site, authored by Science at the National Aeronautics and Space Adminstration, is a news story from July 9, 2004 about the Cassini spacecraft's June 30 encounter with the rings of Saturn. An instrument recorded a...

This web site contains information on the use of different wavelength filters to determine astronomical information by the Hubbble Space Telescope. The use of color to enhance black and white images is included. The...

Satellites are used for just about any purpose imaginable, and the United Nations Institute for Training and Research Operational Satellite Applications Programme (UNITAR) is one that is meant to help out in "the life of...