NASA

Updated at 6:40 p.m. ET

Two NASA astronauts are back on Earth after their space capsule splashed down in the Gulf of Mexico, off the coast of Pensacola, Fla.

The last time any NASA astronauts came home by splashing down was in 1975 — and back then, they were in an Apollo space vehicle. This time, the astronauts were in a white, bell-shaped capsule owned by SpaceX.

JPL-Caltech / NASA

It seems like the world has been fascinated by Mars for decades. Since unmanned missions began in 1960, there have been 56 missions to Mars from countries around the world. While less than half of these missions have been successful, the problems haven’t stopped us.

Updated at 6:55 p.m. ET

NASA astronauts are heading to space from U.S. soil for the first time in nine years, aboard SpaceX's Dragon capsule, the maiden crewed flight of the innovative spacecraft.

The mission, which is sending Doug Hurley and Bob Behnken to the International Space Station, is a bold new venture for the space agency's plan to allow commercial companies to take its astronauts into low-Earth orbit.

Bill Ingalls / NASA

A rocket scheduled to go to the International Space Station on Sunday will carry a Wisconsin experiment that could help in the fight against bacteria that resist antibiotics. The research may also assist future astronauts and other space travelers.  

Chuck Quirmbach

In the next decade, NASA is promising to send men and women back to the moon. Plus, there are international plans to start assembling a platform near the moon, called Deep Space Gateway, from which to set forth on missions to Mars or elsewhere in the solar system.

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?

On The Ground With Jim Locke, NASA Flight Surgeon

Nov 17, 2014
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.