Black Holes

Black holes are regions in space-time with immense gravity, formed from dying stars or high-energy collisions. They grow by consuming surrounding matter and are found at the center of most galaxies. Despite emitting no light, their existence is confirmed through gravitational lensing and the movement of stars. The core of a black hole is dense, possibly made of quarks, surrounded by an event horizon. Supermassive black holes, like the one at the center of the Milky Way, are detected by observing the rapid orbit of nearby stars.

What is a key characteristic of black holes that prevents even light from escaping?

• Their immense size

• Their strong magnetic field

• Their high temperature

• Their powerful gravitational pull

What happens to a star's core when it collapses and forms a black hole?

• It becomes a neutron star

• It turns into a white dwarf

• It reaches unimaginable density

• It explodes into a supernova

What is the event horizon of a black hole?

• The point beyond which nothing can escape

• The outermost layer of a black hole

• The region where light is emitted

• The center of the black hole

How do scientists detect black holes if they emit no light?

• Through gravitational lensing

• By observing their magnetic fields

• Through sound waves

• By measuring their temperature

What evidence suggests the presence of a supermassive black hole at the center of the Milky Way?

• The presence of a large number of stars

• The detection of high-energy particles

• The rapid orbit of stars around a dark region

• The emission of strong radio waves