What is that we can now say with the recent discovery of a distant planet that appears to be just like the only planet on which we humans know for sure that life exists?
"This is the first validated Earth-sized planet in the habitable zone of another star," Dr. Quintana said. "We can now say other potentially habitable worlds the size of Earth can exist."
Astronomers have discovered a planet about the size of Earth where water might exist: http://t.co/EL7dukm28H (NASA) pic.twitter.com/Gmn6G4P8by
— Wall Street Journal (@WSJ) April 18, 2014
This other earth is in a constellation that's 459 light years from our earth.