Understanding Black Holes

What is a black hole primarily characterized by?

• Its bright color

• Its ability to emit light

• Its strong gravitational pull

• Its large size

How do astronomers infer the presence of a black hole?

• By measuring the temperature of space

• By observing the behavior of nearby stars

• By directly observing them

• By detecting sound waves in space

What event can lead to the formation of a stellar-sized black hole?

• A galaxy expanding

• A planet colliding with a star

• A comet passing by a star

• A star running out of fuel and exploding

What is the event horizon of a black hole?

• The boundary beyond which nothing can escape

• The visible surface of the black hole

• The core of the black hole

• The outer ring of a black hole

How does the mass of a black hole affect its event horizon?

• The more massive it is, the larger the event horizon

• The mass does not affect the event horizon

• The more massive it is, the smaller the event horizon

• The event horizon is always the same size