Black Hole Quiz

John Michell, an 18th-century English scientist, first proposed the idea of a "dark star" in 1783. However, modern black hole theory is based on Einstein’s general relativity.

We can think of the event horizon as the black hole's surface. Inside this boundary, the velocity needed to escape the black hole exceeds the speed of light, which is as fast as anything can go.

Accretion is the process by which a black hole gathers surrounding gas, dust, and stars into its gravitational pull.

Stephen Hawking proposed that black holes emit radiation, known as Hawking radiation, due to quantum effects near the event horizon.

Cygnus X-1, discovered in 1964, was the first strong black hole candidate observed through X-ray emissions.

Sagittarius A* is a supermassive black hole located at the center of the Milky Way galaxy.

The term "singularity" describes the central point of a black hole where its entire mass is intensely focused.

The strength of a black hole's gravity depends primarily on its mass, not size, color, or temperature.

The Event Horizon Telescope (EHT) captured the first-ever image of a black hole in 2019, specifically the supermassive black hole at the center of the galaxy M87.

When two black holes merge, they form a larger black hole, emitting gravitational waves in the process.