NASA

NASA History Office and the NASA JSC Media Services Center / NASA

On July 20, 1969, American astronauts Neil Armstrong and Buzz Aldrin became the first humans to walk on the moon. The Apollo 11 mission was the pinnacle of NASA’s decade long efforts to conquer space flight. It occurred just eight years after President John F. Kennedy announced a national goal of landing a man on the moon by the end of the 1960s.

Historic preservationists are hoping that the upcoming 50th anniversary of the Apollo 11 moon landing this summer will persuade the United Nations to do something to protect Neil Armstrong's footprints in the lunar dust.

NASA/JPL-Caltech

Scientists at NASA's Jet Propulsion Laboratory in Pasadena, Calif., are preparing to give extra thanks this holiday weekend when their latest mission to Mars — the InSight Mars Lander — touches down on the surface of the Red Planet on Monday afternoon.

NASA Planetary Defense Coordination Office

These days, the word 'asteroid' usually only comes up when we're talking about the extinction of the dinosaurs. But astronomy contributor Jean Creighton notes that a near-Earth object,or NEO, is either a comet or asteroid that gets within 30 million miles from the Earth's surface. But what would we do if a massive object were hurtling toward Earth today?

NASA

The Rosetta mission - the first probe ever to land on the surface of a comet - had no people aboard.  

NASA/Carla Thomas

A Milwaukee astronomer is about to take the trip of a lifetime, traveling 45,000 feet into the sky aboard a NASA aircraft.