Supergirl, the Silver Age

V. 1: "For many years, Superman believed himself to be the only survivor of his planet's destruction, until one day a spacecraft crashed on Earth with a young girl inside--a Supergirl from Krypton, possessing all the same powers as the Man of Steel. And this Maid of Might wasn't just any Kryptonian survivor, but Superman's cousin, Kara Zor-El."--