Green Meteorite May Be from Mercury, a First
by Miriam Kramer, SPACE.com Staff Writer
Date: 28 March 2013 Time: 03:19 PM ET
Scientists may have discovered the first meteorite from Mercury.
The green rock found in Morocco last year may be the first known visitor from the solar system's innermost planet, according to meteorite scientist Anthony Irving, who unveiled the new findings this month at the 44th annual Lunar and Planetary Science Conference in The Woodlands, Texas. The study suggests that a space rock called NWA 7325 came from Mercury, and not an asteroid or Mars.
NWA 7325 is actually a group of 35 meteorite samples discovered in 2012 in Morocco. They are ancient, with Irving and his team dating the rocks to an age of about 4.56 billion years.
"It might be a sample from Mercury, or it might be a sample from a body smaller than Mercury but is like Mercury," Irving said during his talk. A large impact could have shot NWA 7325 out from Mercury to Earth, he added.
Read more: http://www.space.com/20426-mercury-m...messenger.html