When we think of a day, we usually imagine 24 hours. But did you know that not all planets have days that last 24 hours? In ...

ALMA captures surprising activity in comet C/2014 UN271, Bernardinelli-Bernstein comet, the largest ever detected.

A natural satellite is simply a celestial object that orbits a planet or a smaller body. Unlike the ones we build and send up ...

As scientists get closer to putting humans on Mars, the need to understand why clocks tick faster on the red planet is more ...

The interstellar object 3I/ATLAS has been something of a mystery ever since it graced our solar system. From all outward ...

NASA's OSIRIS-APEX mission, which was one of 19 designated to be canceled by the Trump administration, has been saved from ...