The American Opportunity robot has analyzed the composition of the "Rock bounce" (Bounce Rock). Boulder received this name because at the time of landing on the Red Planet Mars Rover airbags hidden, hit hard on him.
Spectrometers showed composition different from any of the rocks, as previously studied by the rover Opportunity, and its twin Spirit.
However, it is strikingly reminded geologists member of several meteorites found on Earth, which is believed to come to us from Mars.
Previously, such a conclusion about the origin of the "Martian" meteorites do, mainly on the basis of the coincidence of gas contained in bubbles inside meteorites, with the composition of the Martian atmosphere.
However, until now at the Mars scientists could not find a single stone, similar in composition to the "Martian" meteorites.
Now he's found. The range of newly learned stone is very close to that of meteorites identified as the origin of the Martian rocks.
These rocks may have been knocked out from the surface of the Red Planet asteroid or comet impacts, and then fell to earth.
The main component of "Bounce" — a mineral pyroxene. Such a high proportion of it is not in any nearby rock. But the mystery was solved quickly.
Remote analysis of the surface composition, conducted with orbiters orbiting Mars shows a possible place of origin "Bounce."
This impact crater with a diameter of about 25 kilometers, which lies 50 kilometers to the southwest of the rover.