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2011-12-04 13:02

New ’super-Earth’ detected by NASA’s Kepler mission



A new Earth-sized planet has been discovered orbiting a star just 352 light years away, but there’s very little chance of it hosting life because the surface is a toasty 1,627C (2,960F), the Daily Mail newspaper reported Thursday.

Found lurking in the Kepler star field, it has been named Kepler-21b and its parent star, the snappily titled HD 179070, is so close it can be viewed with a home telescope, the report said.

This latest addition to our star charts was spotted by NASA’s Earth-orbiting Kepler probe, which has found hundreds of new planets since its launch in 2009.

As UK astronomer Dr. Heather Couper acknowledges, the discovery of Kepler-21b is one more reason why these are such exciting time for star gazers, the newspaper said.

She told MailOnline, “The technology is getting really cool and the Kepler mission has been incredibly successful.
“We’re now detecting lots of super-earths and Kepler-21b is one of them.”

Although similar in size to Earth, it only lies 3.7million miles from its parent star, so the chances of finding life there are incredibly remote, the Daily Mail said. By comparison, Mercury is 35million miles from our Sun, and even that is too close for life.

Dr. Couper, according to the Daily Mail, said, “Kepler-21b is only 1.6 times the radius of the Earth, so it’s probably a rocky planet. The problem is that it’s far too close to its parent star to sustain any life.

“It goes round the star in 2.8 days, so it’s going to be be searingly hot. Mercury goes round in 88 days and that’s also searingly hot.”





관련 한글기사


슈퍼지구 발견, "표면 온도 뜨거워 생명체 없을 듯"

영국 일간지 '데일리메일' 온라인판은 미국 항공우주국(NASA)이 352광년 떨어진 새로운 슈퍼지구를 발견했다고 1일 보도했다.

슈퍼지구는 지구처럼 암석으로 이뤄져 있고 질량은 지구의 2배~10배에 달하는 천체를 이르는 것이다. 이번에 발견된 '케플러 21b'는 암석 형태로 이뤄져 있으면서 지구 반경의 1.6배 크기라고 보도는 전했다.

다만 '케플러 21b'는 항성과 약 600만km밖에 떨어져 있지 않아 표면 온도가 섭씨 1,627도에 달한다. 영국 천문학자 헤더 쿠퍼 박사는 "표면 온도가 너무 뜨거워 생명체가 살 확률은 낮다"고 밝혔다고 데일리메일이 전했다.

지구와 가까운 슈퍼지구임에도 불구하고 생명체 발견의 가능성은 낮다는 것.


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