Chuck Yeager, 1st pilot to break the sound barrier, personified what it meant to have the right stuff. He still actively tweets; if you're on Twitter, send birthday greetings to @GenChuckYeager.
As the young moon receded from Earth and began spinning more slowly, its large equatorial bulge would have shrunk, cooled and hardened. Today, this fossil bulge on the moon tells a story about the early solar system.
Night falls when your part of the world slides into Earth's shadow. Data acquired by the Suomi NPP satellite - over 22 days in 2012 - were used to assemble this composite image of Earth at night.
