Longtime NASA astronaut Don Pettit, who has ventured to space four times, returned to Earth on Saturday night from the International Space Station. Pettit, who turned 70 on Sunday, landed at 9:20 ...

It wasn't a coincidence that Katy Perry released her galactic love song E.T. 14 years ago. For many years, the global pop star has been fascinated with Isaac Newton, astrophysics and everything ...