“Alien matter” detected by a NASA spacecraft orbiting Earth shows that the chemical make-up of our solar system differs from that of the surrounding galaxy. Researchers discuss the possible meaning of this mismatch in this week’s ScienceCast video.
Visit http://science.nasa.gov/ for more.
Traces of life on Mars: Olympus Mons
NASA Spacecraft Reveals Changes at Solar System’s Edge
Guide to our Galaxy
From the Solar System to the Hyades cluster
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