NASA's Chandra X-ray Observatory has released four stunning images of cosmic wonders, depicted in red, white and blue for the America 250 anniversary on July 4.

Following an initial frenzy a decade ago, the commercial space sector is getting a new wave of investment. This time, things are markedly different, experts say.

A one-of-a-kind NASA space telescope is about to fall out of the sky. For more than two decades, the Neil Gehrels Swift Observatory telescope has gazed at the fading afterglows of

A backup version of Skylab was displayed when the Smithsonian’s National Air and Space Museum opened 50 years ago. After renovation of the building, the artifact is once more on view in a new gallery

A brand-new space telescope is nearing the launchpad, and NASA says it could open a new window into the universe.

The orbital surgery on the International Space Station returned the Canadian-built robot arm to full health after its "wrist" joint failed last month.

NASA astronauts Chris Williams and Jessica Meir completed a 7-hour, 20-minute spacewalk Tuesday to replace a malfunctioning wrist joint on the International Space Station's Canadarm2 robotic arm.

It’s sometimes easy to overlook the fact that the International Space Station (ISS) is a giant lab where scientists study everything from biology to physics—but in space. This extraordinary resource makes extraordinary research possible—like creating a fifth state of matter in space.