Searching for Other Earths
Clip | 6m 10s | Video has closed captioning.
Findings by the Kepler telescope, which NASA launched into space in 2009, have led University of California, Berkeley, astronomers to estimate that in our Milky Way galaxy alone there are 40 billion planets similar to Earth, both in size and temperature. Now scientists are trying to figure out which of these exoplanets might have water, the basic ingredient of life.
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