Black Holes!!

Front

What is a black hole?

Back

A region in space with gravity so strong that nothing can escape.

Front

How can we see black holes?

Back

We see the light of the stars at its event horizon, which reflects off of objects around the accretion disk.

Front

What happens to light when it gets too close to a black hole?

Back

It gets pulled in and disappears.

Front

What is an accretion disk?

Back

A structure formed by the diffuse material in orbit around a massive central body like a star or black hole.

Front

What is a neutron star?

Back

An extremely dense mass of neutrons formed at the core of a supernova; neutrons are formed by the compression of electrons and protons.

Front

What is the event horizon of a black hole?

Back

The boundary around a black hole beyond which no light or other radiation can escape.

Front

What is the Schwarzschild radius?

Back

The radius of the event horizon of a non-rotating black hole.

Front

What is Hawking radiation?

Back

The theoretical prediction that black holes can emit radiation due to quantum effects near the event horizon.

Front

What is the difference between a black hole and a neutron star?

Back

A black hole has an escape velocity greater than the speed of light, while a neutron star is a dense remnant of a supernova.

Front

What is gravitational lensing?

Back

The bending of light from a distant object due to the gravitational field of a massive object, like a black hole.