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Exhibition Text

The journey to the Earth 

How did these rocks from Mars end up on Earth? Only one thing could send a piece of rock flying out fast enough to escape Mars's gravity: an asteroid or comet slamming into Mars. Mars's gravity is about one-third as strong as Earth's, and its atmosphere is about 125 times thinner, so it is easier to eject a rock from Mars than from Earth. After orbiting the Sun for more than a million years, some of the ejected pieces eventually struck Earth as meteorites.

Collection Information

LOS ANGELES

Found October 30 1999, Los Angeles County, California, USA

SHE

AMNH 5013

For Educators

Topic: Astronomy

Subtopic: Planets

Keywords: Meteorites, Astrophysics, Mars (Planet)--Atmosphere, Astrogeology, Asteroids

Audience: General