About 5 billion light-years away from where you're sitting, in one of the most massive galaxies on record, there exists an astonishing black hole. It was only just measured by scientists who managed ...

New discoveries of objects in the Kuiper Belt have also presented challenges for the Planet Nine theory. The latest is known ...

Astronomers propose a giant, hidden planet beyond Neptune to explain odd orbits of distant Kuiper Belt objects.

A deceptive difference having to do with Earth's and Mars's gravity may be the reason why NASA's rovers get stuck in the ...

An international team of physicists discovered the largest-ever merger of 2 black holes through a phenomenon known as gravitational waves.

“A human can do this only if the respective black hole is supermassive and isolated, and if the person entering the black ...

The weak gravitational pull on a particle just half the mass of a grain of sand has been measured for the first time. This most precise measurement of its kind is a breakthrough towards the ...