How surface composition and meteoroid impacts mediate sodium and potassium in the lunar exosphere

Author:

Colaprete A.1,Sarantos M.23,Wooden D. H.1,Stubbs T. J.4,Cook A. M.15,Shirley M.1

Affiliation:

1. Space Science Division, NASA Ames Research Center, Moffett Field, Mountain View, CA, USA.

2. Heliophysics Science Division, NASA Goddard Space Flight Center, Greenbelt, MD, USA.

3. University of Maryland, Baltimore County, Baltimore, MD, USA.

4. Solar System Exploration Division, NASA Goddard Space Flight Center, Greenbelt, MD, USA.

5. Millennium Engineering and Integration Services, Moffett Field, CA 94035, USA.

Abstract

The Moon's time-variable exosphere Earth's Moon does not have a conventional gaseous atmosphere, but instead an “exosphere” of particles ejected from the surface. Colaprete et al. have used NASA's LADEE orbiter to investigate how the exosphere varies over time, by using the glow from sodium and potassium atoms as a probe (see the Perspective by Dukes and Hurley). The exosphere composition varies by a factor of 2 to 3 over the course of a month, as different parts of the Moon are exposed to sunlight. There are also increases shortly after the Moon passes through streams of meteoroids. Science , this issue p. 249 ; see also p. 230

Funder

NASA

Publisher

American Association for the Advancement of Science (AAAS)

Subject

Multidisciplinary

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