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5 Intriguing Earth-Sized Planets
By Mike Wall
SPACE.com Senior Writer
posted: 26 August 2010
02:17 pm ET
The announcement today of a newfound group of alien planets orbiting a distant star has added another candidate for the growing list of potential Earth-sized worlds beyond our own solar system.
Astronomers still have to confirm the presence of the possible Earth-sized world. But they suspect it has a radius just 1.5 times that of Earth, which would make it the smallest alien planet yet found, if confirmed.