cassini

Life at the SETI Institute

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From Dust to Planets

By Dr. Paul EstradaPlanetary physicist at the Carl Sagan Center for the Study of Life in the Universe, SETI Institute, and Gail Jacobs If planets are a dime a dozen, moons are less than a penny each. There are at least 139 moons just within our own solar system. Most of these are the property…

By Dr. Mark R. Showalter Planetary Astronomer at the Carl Sagan Center for the Study of Life in the Universe, SETI Institute In 1609, Galileo introduced to the world his new invention, the astronomical telescope. It opened up new opportunities to explore a territory that all prior generations had regarded as familiar–the night sky. In…