Astronomers have announced that a mystery object orbiting a star 170 light-years from Earth might have formed from the collision and merger of two protoplanets. The object, known as 2M1207B, has ...

A favorite pastime of astronomers is to debate the origin of Earth’s Moon, but despite decades of research, they don’t seem to be any closer to reaching a consensus. Scientists have now added a new ...

The moon did indeed coalesce out of tiny bits of pulverized planet blasted into space by a catastrophic collision 4.5 billion years ago, two new studies suggest. The new research potentially plugs a ...