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1 .This is Scientific American's 60-Second Space. I'm John Matson. Got a minute?
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2 .The search for habitable, Earth-like planets keeps turning up promising candidates.
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3 .And although astronomers have yet to find an Earth twin, some newly discovered worlds are pretty interesting in their own right.
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4 .NASA's Kepler space telescope recently spotted seven new exoplanets,
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5 .three of them in or near their stars' so-called habitable zones.
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6 .That's the temperate region where a planet could accommodate liquid water.
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7 .But all three worlds are bigger than Earth, and their composition is uncertain.
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8 .They could be rocky like Earth or water worlds without landmasses.
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9 .The discoveries are in the journal Science and in the Astrophysical Journal.
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10 .The planet Kepler 69c follows a Venus-like orbit around a sunlike star.
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11 .Kepler 69c could be habitable, or it could be a bit too hot, depending on how much starlight the planet absorbs.
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12 .Kepler 62e and 62f are smaller, and orbit a star smaller than the sun.
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13 .One planet receives about 60 percent less radiation than warms Earth, and the other gets about 20 percent more.
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14 .It's possible that those attributes render Kepler 62e or 62f habitable,
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15 .but astronomers don't yet know whether they are too cold, too hot or just right.
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16 .Thanks for the minute, for Scientific American's 60-Second Space. I'm John Matson.
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