The idea of cosmic threats to Earth almost sounds like the stuff of fiction. But while alien invasions may be far fetched, ...

The so-called 'planetesimal belts' are filled with tiny millimeter-sized particles created by collisions between comets.

This once-in-a-generation shift is a pivotal power play in a saga that will unfold in the years and decades to come.

University of Arizona researchers have unveiled evidence of romance at the farthest reaches of the solar system: a cosmic ...