Using radiation to measure distances is a general method in astronomy, but until now black holes have never been used to help measure these distances. By adding together measurements of the amount ...

Using a powerful mathematical tool, scientists have unveiled the intricate "ringing" of black holes, unlocking patterns missed for decades and laying the groundwork for sharper gravitational wave ...

Measuring the delay reveals how far away the outer disk of gas is from the black hole. Coupled with its rotation rate around the galaxy, this allows astronomers to measure the SMBH's mass, Grier ...

By JUDY SIEGEL-ITZKOVICH FEBRUARY 24, 2013 01:44 GIANT BLACK hole in the center of a far-off galaxy 370 (photo credit: Drawing, Courtesy NASA) ...

It's not always easy to measure precise distances on the fly with a tape measure. If you want a quick method, Instructables user bfk suggests punching out holes with a hole punch so you can ...

It's not easy to get the measure of a monster black hole, but the ALMA observatory just weighed one at 660 million times the mass of the Sun.

Scientists say the two black holes merged after colliding at speeds near the limit allowed by Albert Einstein’s theory of general relativity ...

A collaboration between humanity’s three gravitational wave detectors have identified a black hole merger event that created something 225-times the size of our Sun. It’s the largest such event ever ...

In order to measure the mass of the black hole, the researchers used a technique referred to as reverberation mapping, which measures the radiation thrown off by a rotating disk around a black hole.