A mystery interstellar object discovered last week is likely to be the oldest comet ever seen—possibly predating our solar ...

The universe isn’t just a vast collection of inanimate objects,could it actually be alive? From Earth’s motion to the dance ...

The Milky Way could have many more satellite galaxies than scientists have previously been able to predict or observe, ...

A renowned physicist believes he's cracked the mystery of where a giant unidentified object hurtling through our solar system ...