Earth may have a moon today because a nearby neighbor once crashed into us, a new analysis of Apollo samples and terrestrial ...

After decades of searching, astronomers may have finally stumbled upon the first moon known to exist beyond our solar ...

Enceladus is Saturn's sixth-largest moon, a 500 km-wide icy world famed for its south polar geysers spewing water from a ...

Still, science being science, we needed proof—and we got it in 1992, when two astronomers found two planets orbiting a pulsar ...

An international team including astronomers from the University of Geneva (UNIGE) and the National Center of Competence in ...

A new study indicates the possibility of unexpected changes in the trajectory of comet 3I/ATLAS before its departure from the ...

Ask someone on Earth for the time and they can give you an exact answer, thanks to our planet's intricate timekeeping system, ...

A new study reveals how shifting ice shells on icy moons can cause dramatic pressure changes, sometimes enough to boil their hidden oceans. The outer planets of our Solar System are accompanied by ...

Asteroid 433 Eros is swinging back into Earth’s neighborhood this weekend, bright enough for backyard telescopes and even ...

Eight "skylights" may be entrances to underground spaces where evidence of ancient microbial organisms could be found.