New analysis suggests that problems with NASA’s MAVEN Mars orbiter may be more serious than a simple communications glitch.

Astronomers have made an unexpected discovery about the planet TOI-3884b, which orbits its star at a crazy angle. The planet’s orbit is tilted by around 62 degrees compared to the star’s rotation, and ...

China sent a spacecraft carrying three astronauts to its space station for the first in-orbit crew rotation in Chinese space history, launching operation of the second inhabited outpost in low-Earth ...

U.S. and Chinese satellites routinely spy on each other in orbit, rehearsing for more aggressive operations in the event of war.

This is an interesting question, and the answer tells us something important about how planets form, as astronomers believe whether a planet travels clockwise or counterclockwise around its star is ...