Astrophysics Quiz

What is the fundamental force responsible for holding stars, planets, and galaxies together?

• Electromagnetic force

• Weak nuclear force

• Gravity

• Dark energy

According to Einstein’s General Theory of Relativity, what causes gravity?

• The attraction between masses

• The curvature of spacetime due to mass

• The repulsion between dark matter and normal matter

• The rotation of celestial bodies

What is the speed of light in a vacuum?

• 30,000 km/s

• 150,000 km/s

• 300,000 km/s

• 1,000,000 km/s

What is the name of the boundary beyond which nothing can escape a black hole?

• Singularity

• Schwarzschild Radius

• Event Horizon

• Photon Sphere

If you were falling into a black hole, what effect would an outside observer see?

• You would speed up and disappear instantly

• You would slow down and never appear to reach the event horizon

• You would become brighter due to energy emission

• You would be repelled away before reaching the event horizon

What happens to time as you approach the event horizon of a black hole?

• It speeds up

• It stays the same

• It slows down relative to an outside observer

• It reverses

What is a singularity in the context of black holes?

• A point in space with zero gravity

• A region where time stops

• A point of infinite density and zero volume

• A wormhole connecting two universes

What is dark matter believed to be responsible for?

• Expanding the universe

• Making stars shine

• Providing extra gravitational pull in galaxies

• Absorbing cosmic radiation

What percentage of the universe is estimated to be dark energy?

• 5%

• 25%

• 50%

• 70%

How do scientists detect dark matter?

• By observing its gravitational effects on galaxies

• By detecting emitted light

• By capturing dark matter particles

• By measuring its temperature