(National/NASA/James/JPL-C ) The planet, named Kepler-37b, has a surface temperature of more than of 400 degrees centigrade, making water, and therefore life, impossible.
Nasa Finds Tiniest Planet Ever Seen
FEBRUARY 21, 2013Mark Prigg, Daily Mail
The smallest known planet outside our solar system has been detected by NASA's alien-hunting Kepler space telescope.
It is slightly larger than our Moon and orbits its host star every 13 days.
'Even Kepler can only detect such a tiny world around the brightest stars it observes,' said Jack Lissauer, a planetary scientist at NASA's Ames Research Center.
'The fact we've discovered tiny Kepler-37b suggests such little planets are common, and more planetary wonders await as we continue to gather and analyze additional data.'Read more: Daily Mail