Bill Nelson has stepped down as NASA administrator, ending a half-century of public service. Janet Petro is now the agency's ...

In a letter to his replacement, outgoing NASA leader Bill Nelson emphasizes the agency’s activities ‘transcend the length of ...

"America is leading humanity back to the Moon, onward to Mars, and into a golden age of space exploration," Nelson wrote, ...

NASA Administrator Bill Nelson has left the building, and while President Trump’s nominee awaits a confirmation hearing, the ...

Bill Nelson retires as NASA administrator; Janet Petro steps in as acting chief, awaiting Jared Isaacman’s confirmation.

After a long career as a politician from Florida, former astronaut Bill Nelson has served as NASA's administrator for the last three and a half years. He intends to resign from this position in about ...

President Donald Trump asked SpaceX Founder Elon Musk to bring astronauts Butch Wilmore and Suni Williams back to Earth, ...

The founder of SpaceX said President Trump had asked his company to return two astronauts aboard the space station to Earth ...

The Mars Sample Return mission has been ranked as the highest priority by planetary scientists, who hope to find signs of ancient life on Mars.

NASA Administrator Bill Nelson stepped down on Monday after President Donald Trump was inaugurated, and the departing space agency chief had some words of advice for his replacement. In a letter ...