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

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

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

A collection of Martian rocks could reveal details about potential past life on the Red Planet – but first NASA has to get ...

NASA's mission to return samples from Mars and potentially discover the first signs of alien life has a new timeline. The ...

KENNEDY SPACE CENTER — With less than a month left to go before stepping down as head of NASA, Bill Nelson warns his stance on conflicts of interest might not be the same as his likely ...

Weather organizations from around the world agree that the planet's average global surface temperature in 2024 could well ...

Administrator Bill Nelson presented a revised scenario Tuesday, less than two weeks before stepping down as NASA’s chief when President-elect Donald Trump is inaugurated. Nelson said he ...

NASA announced Tuesday it had narrowed down to two options the reworked Mars Sample Return mission aiming for a cheaper and quicker completion than the version that had been killed last year.

On this date in 1986, then-U.S. Rep. Bill Nelson (now outgoing NASA administrator) and six additional astronauts launched aboard Space Shuttle Columbia on STS 61C. Shuttle flights had become fairly ...