xilihutu
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作者：xilihutu 在 驴鸣镇 发贴, 来自 http://www.hjclub.org
Scientists Find New Planet Outside Solar System
By VOA News
21 April 2009
Artist's impression of "Planet e" (L) released by European Org. for Astronomical Research in the Southern Hemisphere, 21 Apr 2009
Astronomers said they have discovered the smallest planet ever detected outside our Solar System.
Scientists said the so-called exoplanet is only about twice the size of Earth. They announced the discovery Tuesday at a space conference in England.
The exoplanet orbits the Gliese 581 star, which is just 20.5 light years away from Earth. A light year is equal to the distance that light travels in one year.
It is the fourth exoplanet detected in the system.
Scientists said the newly discovered exoplanet is probably too hot for human life because it sits close to its sun-like host star. But they believe another planet in the system may be habitable.
Researchers made the discovery using a 3.6-meter telescope in La Silla, Chile.
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This is incredible: For the first time, ever, astronomers have captured an optical image of a planet orbiting a star like our own.
And that’s not all: we also have a second picture showing TWO planets orbiting a second star!
(Calm down. Breathe, breathe.)
The first picture is from Hubble. Ready? |
http://blogs.discovermagazine.com/badastronomy/2008/11/13/huge-exoplanet-news-items-pictures/
越来越多星星被发现：
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| Over 300 exoplanets are known in early 2009 and more are continually discovered |
http://en.wikipedia.org/wiki/File:Exoplanets_en.svg
作者：xilihutu 在 驴鸣镇 发贴, 来自 http://www.hjclub.org
上一次由xilihutu于2009-4-26 周日, 上午6:57修改，总共修改了6次 |
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Scientists Find New Planet Outside Solar System
