Nelson and NASA Deputy Administrator Pam Melroy left the agency on Monday (Jan. 20), the day that Donald Trump began his second term as president. Trump has appointed Janet Petro, who most recently served as director of Kennedy Space Center (KSC) in Florida, as NASA's interim chief.

NASA Administrator Bill Nelson has left the building, and while President Donald Trump’s nominee awaits a confirmation hearing, the head of Kennedy Space Center will keep things afloat. Nelson, who flew to space on board Space Shuttle Columbia while a member of the House of Representatives,

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

On this date in 1986, Congressman Bill Nelson launches onboard Columbia on the final successful shuttle flight before the Challenger disaster.

An exploding budget and an unraveling schedule spell disappointment for NASA's mission to learn more about Mars's history.

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

The second Trump administration started with soaring rhetoric about sending humans to Mars but confusion about who was leading NASA on an acting basis.

NASA's James Webb Space Telescope has captured the infrared glow of an ancient supernova's light echo, revealing unprecedented 3D details of interstellar dust and gas. The space between stars is filled with gas and dust,

NASA administrators are also accountable to elected officials. Administrators are appointed by the president but must be confirmed by the Senate. Congress has a great deal to say about the budget that NASA gets each year. They also must authorize major programs, like the Artemis program, which aims to return the U.S. and its partners to the Moon.

Speaking to a crowd at the Kennedy Space Center on Merritt Island, DeSantis said he spoke with NASA director Bill Nelson about the idea and there was "interest." The governor said moving to ...

On Jan. 12, 1986, shuttle Columbia lifted off on the final successful shuttle mission before the Challenger disaster.

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