Black Holes

The video explains the formation of black holes from collapsing stars, where the core collapses into a singularity after a supernova explosion. It describes the properties of black holes, including the event horizon and the immense gravitational pull that prevents even light from escaping. The video also covers accretion disks and the radiation jets they produce. It addresses common misconceptions about black holes, clarifying that they do not consume everything around them. Finally, it discusses the presence of black holes in the Milky Way and their potential threat, noting that the nearest known black hole is 1600 light years away.

What happens to a star's core when it runs out of fuel?

• It becomes a white dwarf.

• It turns into a neutron star.

• It expands and becomes a red giant.

• It collapses in on itself.

What is the region called where the gravitational pull is so strong that not even light can escape?

• Event horizon

• Accretion disk

• Singularity

• Supernova

What can happen if the accretion disk of a black hole spins rapidly?

• Matter can be ejected into space at high speeds.

• It creates a wormhole.

• It collapses into a singularity.

• It forms a new star.

If the Sun were replaced by a black hole of the same mass, what would happen to Earth's orbit?

• Earth would be pulled into the black hole.

• Earth would continue to orbit as usual.

• Earth would be ejected from the solar system.

• Earth would stop orbiting and remain stationary.

How far is the nearest detected black hole from Earth?

• 10,000 light years

• 1 million light years

• 100 light years

• 1600 light years