Gravity Probe B - The Relativity Mission - Relativity gyroscope experiment developed by NASA & Stanford University to test two extraordinary, unverified predictions of Einstein's general theory of relativity. Lunar Prospector - Lunar Prospector was launched to the Moon, Jan 6th, 1998 and ended on July 31 1999 with a controlled crash. LunarSat NASA Discovery Program - Discovery is a series of lower cost, highly focused science investigations designed to enhance our understanding of the solar system. Project Starshine Student Satellite - The second of eleven Starshine student satellites is under construction for a Space Shuttle launch in 2001. Get involved! Space Horizons - The up-to-date Calendar of all major Spaceflight Events in the coming years. Thermal Emission Spectrometer Project Homepage - the home of the Mars Global Surveyor's Thermal Emission Spectrometer (TES) instrument