How scientists search for habitable planets


TG Daily
July 19, 2013

There is only one planet we know of, so far, that is drenched with life. That planet is Earth, as you may have guessed, and it has all the right conditions for critters to thrive on its surface. Do other planets beyond our solar system, called exoplanets, also host life forms?

Astronomers still don’t know the answer, but they search for potentially habitable planets using a handful of criteria. Ideally, they want to find planets just like Earth, since we know without a doubt that life took root here.

The hunt is on for planets about the size of Earth that orbit at just the right distance from their star – in a region termed the habitable zone.

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