Astronomers using NASA's Spitzer Space Telescope believe they have found an exoplanet two-thirds the size of Earth orbiting a star 33 light-years away. The world orbits its star at a distance of only 1.7 million miles, which means it's one hot place, with surface temperatures exceeding 1,000 degrees F.
Astronomers are particularly excited because if this discovery is confirmed it will mean Spitzer is one more tool they'll be able to use to search for planets orbiting other stars.
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