NIST scientists calculated that clocks on Mars would be an average of 477 millionths of a second faster than clocks telling ...

Saturn is on display in the early-evening sky this month along with Uranus and Neptune, both within reach of binoculars.

The NASA Artemis II mission, set to lift off as soon as February, will mark the first time astronauts have aimed to venture beyond near-Earth orbit since 1972.

"It's really not a question of robotic exploration or human exploration," Ehlmann said. "It is an 'and' — it's robotic and ...

Bright full moons, dazzling meteor shower displays and remarkable total eclipses will give stargazers plenty of reasons to ...