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

The astronauts of the Polaris Dawn mission, after traveling through heavy radiation and high orbits, are getting ready to open Read More

After launching early on Tuesday, the billionaire Jared Isaacman and his crew traveled to altitudes not visited by any astronaut Read More

The mission is taking people farther from Earth than anyone has traveled since the end of NASA’s Apollo moon Read More

Two NASA astronauts remain aboard the International Space Station after the troubled vehicle they rode undocked ahead of a landing Read More