During his inaugural address, President Donald Trump said he wants 'American astronauts' on Mars. Where does a future Mars mission currently stand?

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

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

NASA proposes a faster, cheaper plan to bring Mars samples to Earth, aiming for delivery by the 2030s while cutting costs significantly.

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

But NASA administrator Bill Nelson said such failures are necessary ... when the planets' orbits will next align. (Earth/Mars "transfer windows," as such periods are known, occur every 26 months.)

Earlier this month, outgoing NASA Administrator Bill Nelson and other agency officials presented two possible plans for the mission, known as Mars Sample Return, for the incoming administration.

"These samples have the potential to change the way we understand Mars, our universe, and – ultimately – ourselves," Nelson said in a statement. To ensure that the goal of returning Mars ...

Astronauts Suni Williams and Butch Wilmore, who have been on an unexpectedly monthslong assignment after serving on Boeing’s Starliner crewed test flight, are conducting a spacewalk Thursday. The

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

The Houston company is one of nine — including major names like Blue Origin — that received a contract in January.

Happy New Music Friday! The weekend is here, which means more streaming, new playlists and the best that music has to offer -- and ET has you covered for everything in between. First performers have been announced for the 67th Annual Grammy Awards.