Black Hole

LIGO detected the ripples in spacetime on September 14, 2015, from two black holes that had collided over a billion years ago.

The X-ray source was discovered in 1964, and its behavior convinced many astronomers it was a black hole.

In 1974 Hawking showed that black holes should emit faint radiation and eventually evaporate, though the effect has never been observed directly.

The supermassive black hole at our galaxy's center was imaged for the first time in 2022.

The Event Horizon Telescope captured the glowing ring around the black hole at the center of galaxy M87, about 55 million light-years away.

Sagittarius A* (pronounced 'A star') is a compact radio source located at the very center of the Milky Way galaxy, approximately 26,000 light-years from Earth. Its immense gravitational pull influences the orbits of nearby stars, confirming its status as a colossal supermassive black hole.

The Perseus galaxy cluster contains a supermassive black hole that generates pressure waves, creating a B-flat note 57 octaves below middle C. This sound is far too low for the human ear to perceive.

The event horizon is the boundary around a black hole beyond which nothing, not even light, can escape. It marks the point of no return, a critical concept in general relativity.

Rather than empty spaces, black holes are regions in spacetime where gravity is so intense that nothing, not even light, can escape. They form from the remnants of massive stars that collapse under their own gravity, creating a singularity.

Known as Gaia BH1, it's located in the constellation Ophiuchus and is about 10 times the mass of our Sun. This discovery challenges previous assumptions about how many dormant black holes exist in our galaxy and their detectability.