Among 1,200 possible planets, some seem like our own
STEVE EMBER: I'm Steve Ember. STEVE EMBER: Last week, American space agency scientists announced the discovery of possible Earth-like planets. STEVE EMBER: NASA scientists using the Kepler space telescope also announced the discovery of six planets orbiting a star called Kepler-11. STEVE EMBER: Late last week, NASA said astronaut Mark Kelly would return to train with crewmembers on the last flight of the space shuttle Endeavor in April. space shuttle: a spacecraft designed to be used, for example, for travelling between the earth and a space station 航天飞机；太空梭 exoplanet: a planet that orbits a star outside the solar system 【天】（太阳系以外的）外部行星 Related stories: Space shuttle endeavour heads to International Space Station Remembering the X-15, America's first step in manned space flight NASA's Kepler satellite to seek distant Earth-like planets 新发现：有颗类地行星适宜生物存活 （来源：VOA 编辑：崔旭燕）
Survey suggests billions of planets in galaxy › News in Science (ABC Science)
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