The most Earth-like planet ever discovered is circling a star 600 light years away, a key finding in an ongoing quest to learn if life exists beyond Earth. The temperature on the planet is a balmy 22°C and TWICE the size of our world.
The planet, called Kepler-22b, joins a list of more than 500 planets found to orbit stars beyond our solar system. It is the smallest and the best positioned to have liquid water on its surface — among the ingredients necessary for life on Earth. It orbits a star like the Sun 600 light years — that’s nearly 4,000 BILLION MILES — away in the constellation Cygnus. On a side note, a light year is the distance light travels in a year, about 6 trillion miles (10 trillion km).
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