5 Things to Know About Alien Planet Kepler-186f, 'Earth's Cousin'
Friday, April 18, 2014 - 05:30
in Astronomy & Space
A newly discovered planet that has been called 'Earth's cousin' has just been found 490 light-years from Earth.
A newly discovered planet that has been called 'Earth's cousin' has just been found 490 light-years from Earth.