‘Most Earth-like’ planets discovered
"They are the best candidates found to date for habitable planets,"
- Bill Borucki, NASA
The search for a far-off twin of Earth has turned up two of the most intriguing candidates yet.
Scientists say these new worlds are the right size and distance from their parent star, so that you might expect to find liquid water on their surface.
It is impossible to know for sure. Being 1,200 light-years away, they are beyond detailed inspection by current telescope technology.
But researchers tell Science magazine, they are an exciting discovery.
Artist's impression: The outermost pair are the smallest exoplanets yet found in a host star’s habitable zone