Understanding Black Holes

What makes black holes invisible to the naked eye?

• Their gravity is too weak.

• They are too far away.

• They emit too much light.

• Light cannot escape from them.

How do scientists detect black holes if they are invisible?

• By seeing their bright colors.

• By listening to their sounds.

• By observing the effects on nearby objects.

• By feeling their gravitational pull.

What happens when a massive star runs out of energy?

• It becomes a planet.

• It forms a black hole.

• It disappears completely.

• It turns into a comet.

What is a singularity in the context of black holes?

• A point with infinite density.

• A point with no gravity.

• A point with infinite mass.

• A point with no mass.

How does gravity affect the movement of celestial bodies?

• It has no effect on them.

• It pushes them away.

• It makes them spin faster.

• It pulls them towards massive objects.

What is the event horizon of a black hole?

• The center of the black hole.

• The surface of the black hole.

• The boundary beyond which nothing can escape.

• The point where light can escape.

What distinguishes a supermassive black hole from a stellar black hole?

• Its color.

• Its size and mass.

• Its temperature.

• Its location.

What is the purpose of the Event Horizon Telescope?

• To detect radio waves from black holes.

• To measure the temperature of black holes.

• To capture light from black holes.

• To photograph the surface of black holes.

What is an accretion disk?

• A type of star.

• A type of galaxy.

• A new planet formation.

• A disk of gas and dust around a black hole.

Where is the black hole that the Event Horizon Telescope captured?

• In the Milky Way Galaxy.

• In the Andromeda Galaxy.

• In the Messier 87 Galaxy.

• In the Orion Nebula.