Selecting the right spot to smash a spacecraft into the surface of a hazardous asteroid to deflect it must be done with great care, according to new ...

Asteroid deflection could backfire if the impact shoves the rock into a cosmic keyhole, a hidden trapdoor in space.

Two black holes merged together 2.4 billion light years away from Earth, and scientists have just figured out how fast the ...

Firing a gun in space plays out very differently from that on Earth due to some bizarre physics. Here's everything that ...