Astronomers have spotted the brightest known object in the universe, and it’s a quasar powered by the fastest-growing black hole on record, according to a new study. Initially classified as a star, ...

It’s been about 11 years since Pluto was demoted to dwarf planet status, leaving a 1,473 mile (2,370 kilometers)-size void in our hearts. Since then, the hunt for Planet X—aptly renamed Planet 9—has ...

Researchers claim that a quasar, which is 500 times brighter than our sun and the brightest object in the cosmos, was "hiding in plain sight". A quasar driven by the fastest-growing black hole ever ...

A huge object, possibly as big as Manhattan, has entered our Solar System and it might be more than just a rock. Some scientists now say it could be an alien spacecraft, with plans to attack Earth in ...

A newly detected interstellar object called the 3I/ATLAS, is travelling towards the inner solar system at an estimated speed of 135,000 miles per hour, sparking claims from a Harvard astrophysicist ...