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Posts Tagged ‘NLSI’

NASA Lunar Scientists Shed Light on Moon’s Impact History

February 27, 2012 Leave a comment

A team of researchers from the NASA Lunar Science Institute (NLSI) at NASA Ames Research Center, Moffett Field, Calif., have discovered that debris that caused a “lunar cataclysm” on the moon 4 billion years ago struck it at much higher speeds than those that made the most ancient craters. The scientists found evidence supporting this scenario by examining the history of crater formation on the moon.

During Earth’s earliest days, our planet and others in the inner solar system, including the moon, experienced repeated impacts from debris that formed the building blocks of the planets. Over time, as material was swept up and incorporated into the inner planets, the rate of impacts decreased. Then, roughly 4 billion years ago, a second wave of impacts appears to have taken place, with lunar projectiles hitting at much higher speeds. This increase could reflect the origin of the debris, where main belt asteroids were dislodged and sent into the inner solar system by shifts in the orbits of the giant planets.

Full Story: http://www.nasa.gov/centers/ames/news/releases/2012/12-19AR.html

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NASA Partners Uncover New Hypothesis on Crater Debris

September 27, 2011 Leave a comment

A team of researchers partnered with the NASA Lunar Science Institute (NLSI) has developed a new hypothesis for the origin of crater ejecta–debris that is launched out of a crater during meteorite impacts.

These findings may help scientists target samples for extraction during future missions to asteroids and terrestrial bodies such as Mercury, Venus, the moon and Mars. The results are published in the Sept. 21, 2011, issue of the Elsevier journal, Earth and Planetary Science Letters.

The science team, led by professor Gordon Osinski at The University of Western Ontario, London, Ontario, compared observations of ejecta from all terrestrial planets. The observations showed that ejecta deposits all contained more than one layer.

Full Story: http://www.astronews.us/2011-09-27-0129.html