20 Feb '11, 12am

How many planets are there in the Milky Way? Probably more than you thought - scientists estimate 50 billion

How many planets are there in the Milky Way? Probably more than you thought - scientists estimate 50 billion

Scientists have estimated the first cosmic census of planets in our galaxy and the numbers are astronomical: at least 50 billion planets in the Milky Way. -- PHOTO: AP WASHINGTON - SCIENTISTS have estimated the first cosmic census of planets in our galaxy and the numbers are astronomical: at least 50 billion planets in the Milky Way. At least 500 million of those planets are in the not-too-hot, not-too-cold zone where life could exist. The numbers were extrapolated from the early results of Nasa's planet-hunting Kepler telescope. Kepler science chief William Borucki says scientists took the number of planets they found in the first year of searching a small part of the night sky and then made an estimate on how likely stars are to have planets. Kepler spots planets as they pass between Earth and the star it orbits. So far Kepler has found 1,235 candidate planets, with 54 i...

Full article: http://www.straitstimes.com/BreakingNews/TechandScience/S...

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