Planetary scientists sharing ideas and discoveries.

Planetary Science Research Discoveries (PSRD) is an educational site sharing the latest research being made by NASA-sponsored scientists on meteorites, planets, and other bodies in our Solar System. The website is supported by the Cosmochemistry Program of NASA's Science Mission Directorate and by Hawai'i Space Grant Consortium and is a vital link for planetary and space sciences, and for learning how science works.

Supported by NASA's Cosmochemistry Program and Hawai'i Space Grant Consortium.

Archive of Space Weathering Articles

DATE POSTED	ARTICLES
10 AUG 09	Space Weathering Agent: Solar Wind by Linda M. V. Martel Bombardment of helium ions on olivine in the laboratory simulates space weathering of asteroids and other airless bodies.	PSRD-solarwind.helium.pdf
29 APRIL 08	A Farside Geochemical Window into the Moon by Linda M. V. Martel Findings show geochemical enhancements in the Dewar region are caused by thorium-rich mare basalt fragments in the regolith.	PSRD-Dewar-Th.pdf
8 NOV 06	Recent Gas Escape from the Moon by G. Jeffrey Taylor Gases may have escaped from the Moon as recently as a million years ago, implying that the lunar interior is not as lethargic as conventional wisdom dictates.	PSRD-MoonGas.pdf
10 DEC 04	Composition of the Moon's Crust by Linda M. V. Martel New empirical calibrations of Lunar Prospector and Clementine data yield improved global maps of Th, K, and FeO.	PSRD-LunarCrust.pdf
28 SEPT 04	Lunar Crater Rays Point to a New Lunar Time Scale by Linda M. V. Martel Optical maturity maps of rays, derived from Clementine multispectral data and calibrated with lunar sample analyses, provide a new way to define the two youngest time stratigraphic units on the Moon.	PSRD-LunarRays.pdf
5 JULY 04	New Mineral Proves an Old Idea about Space Weathering by Linda M. V. Martel A newly discovered vapor-deposited iron silicide in a lunar meteorite has been named hapkeite.	PSRD-newMineral.pdf
28 JUNE 02	Using Chondrites to Understand the Inside of Asteroid 433 Eros by Linda M. V. Martel Data from ordinary chondrite meteorites and from the NEAR mission suggest that asteroid 433 Eros is heavily fractured.	PSRD-ErosPorosity.pdf
26 FEB 02	The Composition of Asteroid 433 Eros by G. Jeffrey Taylor X-rays and reflected light suggest that asteroid 433 Eros is similar in composition to the most common type of meteorite--maybe.	PSRD-eros.pdf
22 OCT 01	New Data, New Ideas, and Lively Debate about Mercury by G. Jeffrey Taylor A hundred scientists gathered to share new data and ideas about the important little planet closest to the Sun.	PSRD-MercuryMtg.pdf
20 OCT 97	Moonbeams and Elements by G. Jeffrey Taylor The amount of light reflected off the Moon can be used to determine elemental abundances from orbit.	PSRD-MoonFeO.pdf


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