BIG IDEA DETECT ALIEN LIFE ON A TIGHT BUDGET

摘要

Last December Astron-omers excitedly announced the discovery of a planet called Kepler 22b. Located 620 light-years away, it is the first planet found by NASA's Kepler space telescope to reside in its star's habitable zone-a region that can support liquid water, a key requirement for life on Earth. One nasa artist took the news a step further with the illustration above, depicting an inviting blue, cloud-streaked world like our own.