A team of astronomers has found the first binary star system, D9, near the supermassive black hole Sagittarius A*. Previously ...

The Kuiper Belt is a vast region beyond Neptune filled with icy remnants from the early solar system. Over 3,000 KBOs have ...

critical phenomena in gravitational collapse, the initial value problem of general relativity, and relativistic astrophysics. Research in gravitational physics is currently being conducted in JILA.

After 17 years of observation, researchers are certain that what they thought was a group of two celestial bodies is actually ...

They're extremely dense, with gravitational forces so strong ... Another way that black holes form is from the direct collapse of gas, a process that is expected to result in more massive black ...

and radiation pressure from the nuclear reactions tends to expand it outwards. In other words, the gravitational collapse is balanced by the expansion due to fusion energy.