Exploring the Universe: Black Holes and Quasars

What is the significance of the 'smudge' or 'blob' in astronomy?

• It is a new planet discovered in our solar system.

• It represents a distant galaxy with a supermassive black hole.

• It is a type of nebula.

• It is a new type of star.

How does Abell 2744 help astronomers observe distant objects?

• By absorbing cosmic radiation.

• By emitting its own light.

• By acting as a gravitational lens.

• By reflecting light from nearby stars.

What is UHZ1 known for?

• Being the largest galaxy in the universe.

• Being a newly discovered planet.

• Being the closest quasar to Earth.

• Being the most distant quasar ever discovered.

What is the Eddington limit?

• The maximum speed a black hole can rotate.

• The maximum distance a black hole can be observed.

• The maximum rate at which a black hole can feed.

• The minimum size a black hole can be.

Why is the absence of intermediate-mass black holes puzzling?

• Because they emit no radiation.

• Because they are only found in certain galaxies.

• Because they are too small to be detected.

• Because they should exist if supermassive black holes grew from stellar black holes.

What does the heavy seed model propose?

• Black holes form from the collapse of stars.

• Black holes form directly from gas clouds.

• Black holes form from dark matter.

• Black holes form from the collision of galaxies.

What is an OBG in the context of black holes?

• An overly-massive black hole galaxy.

• A new type of quasar.

• A black hole formed from dark matter.

• A type of star cluster.

How does UHZ1 challenge the small seed model?

• By being too close to Earth.

• By being a different type of celestial object.

• By being too distant to have grown from a small seed.

• By being too small to fit the model.

What evidence supports the heavy seed model?

• The discovery of UHZ1 and its characteristics.

• The discovery of new planets.

• The presence of intermediate-mass black holes.

• The absence of any black holes in the universe.

What role does the James Webb Space Telescope play in these discoveries?

• It emits X-rays to study black holes.

• It observes deep into infrared wavelengths.

• It measures the temperature of distant planets.

• It captures visible light images of stars.