Barry E. DiGregorio

Articles

Mars Express Finds Evidence of Liquid Water on Mars

January 01, 2006

Since the discovery of gullies on Mars in 2000, NASA has endeavored to re-image areas known to have them. Now for the first time, using before and after images taken of the same region on Mars, a dune gully flow is shown to have happened very recently.

GC–MS Analysis on Titan Mission

May 02, 2005

The European-built Huygens probe made history on January 14 by becoming the first spacecraft to land on Saturn's largest moon. The Huygens gas chromatography–mass spectrometry team concluded that methane rain occurs on the moon, and GC–MS can distinguish between two isotopic forms of carbon — carbon-12 and carbon-13. By comparing the carbon-12/13 ratios it might be possible to pin a biological source to the methane arising from the interior of Titan.

Spectroscopy and the Search for Ancient Life on Mars (PDF)

February 01, 2005

The author discusses an instrument called SEARCH (Scan for Extinct Astrobiological Residues and Current Habitats) designed for use on NASA Mars rover missions.

The Planetary Shared Sample Library: A New Tool for Planetary Science (PDF)

March 01, 2003

The University of Leicester?s Space Research Centre has begun to assemble a database for use by all planetary scientists and engineers in the analysis of rocky planets, moons, and asteroids.