Two planets identified as most similar to Earth
Tuesday, April 21, 2009 - 18:56
in Astronomy & Space
Both orbit the same star, 20 light-years from Earth, called Gliese 581. The larger of the two orbits in the 'habitable zone,' and could have oceans. After locating more than 340 planets orbiting other stars, astronomers have identified two that are the most similar to Earth so far.