Astronomers believe about one or two supernovae—or possibly at a rate even lower than that—occur each century in galaxies like the Milky Way, but the good news is there are only two nearby stars which could go supernova within the next million years or so: Antares and Betelgeuse.

However, both of these are more than 500 light-years away from us and computer simulations have previously suggested a supernova at that distance from Earth likely wouldn't affect our planet.

As Barry “Butch” Wilmore and Suni Williams prepare to come home after their unexpected nine-month ISS stay, here is what they may experience

Dark matter continues to confound us, so far defying every attempt to decipher it.

All life on Earth can be traced back to a Last Universal Common Ancestor, or LUCA—and it likely lived on Earth only 400 million years after its formation.