The Mars Sample Return effort was billions of dollars over budget and not expected to return to Earth with its Read More

The company, owned by the Amazon founder Jeff Bezos, also received approval from the Federal Aviation Administration to launch the Read More

It is unclear where the program to go back to the lunar surface will head after President-elect Donald J. Trump Read More

Mr. Isaacman’s company Shift4 Payments made him a billionaire, and he has financed two trips to orbit on SpaceX Read More

The agency’s top medical official was responding to rumors that Suni Williams had lost an unusual amount of weight Read More

Three NASA astronauts and a fourth from the Russian space agency returned to Earth from the International Space Station on Read More

The spacecraft lifted off Monday on a SpaceX Falcon Heavy rocket, embarking on a nearly six-year journey to Jupiter.Read More

The spacecraft will lift off Monday on a SpaceX Falcon Heavy rocket on a nearly six-year journey to Jupiter.Read More

An explosion of particles is expected to reach Earth on Thursday, and could lead to visible Northern Lights in much Read More

Two astronauts — one American, one Russian — are headed to the International Space Station with two empty seats for crewmates who Read More