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The Sun Has a Twin?Does the Earth Have One Too?

NASA has discovered that our sun has a twin that is nearly identical in temperature, rotation and age. Scientists hunting for extraterrestrial life hope to find planets orbiting around it.

Tariq Malik writes in the NASA website space.com that the star, called 18 Scorpii, is less than 50 light-years away in the constellation Scorpio. It burns only slightly hotter than the Sun, and rotates slightly faster, taking 23 days to complete a rotation rather than 25. But it's an extremely close match.

If we can spot a planet orbiting around it that's about the same distance away as the Earth, we may have a reason to make contact.

Art credit: http://gimp-savvy.com

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