A NASA telescope is barely clinging to space after a failed rescue effort left it tottering and sinking toward Earth. A few pieces that don't burn up in the atmosphere are expected to land in the ocean on or about Friday.

An aging NASA telescope is barely clinging to space after a failed rescue effort left it tottering lower and lower. The U.S. Space Force predicts the Swift Observatory will come crashing down on or around Friday.

It's unclear at the moment exactly when and where the Swift observatory will plunge to Earth. But researchers definitely have their eyes peeled.

NASA's Swift Observatory may make a fiery return to Earth around Friday after more than two decades studying gamma-ray bursts.

The second crew that spent a year inside NASA's simulated Mars habitat is emerging today, and the agency will stream it live.

Four volunteers emerged from NASA’s yearlong CHAPEA Mars simulation at Johnson Space Center after 378 days living in isolation in a 3D-printed habitat. The mission tested the demands of life on Mars—including limited resources,

After 378 days inside, Mission 2 is finally over—and four people are about to get reacquainted with Houston.

The four volunteers were in a 3D-printed habitat designed to simulate what it would be like to live on Mars.