Why Are Quasars Rare Today

question 46

Multiple Choice

Why are quasars rare today?

• A) The Universe's expansion has spread out the quasars.
• B) The black holes are too massive to be classified as quasars.
• C) There is so much dust today that it obscures quasar emission.
• D) Little gas is left to accrete onto supermassive black holes.

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Definitions:

Regenerating

The process of renewal or restoration of a biological system or part thereof to its original state.

Mature

Refers to an organism or entity that has reached full growth or development, or to ideas and plans that are fully thought out and ready for implementation.

Carbon Dioxide

An invisible, scentless gas that results from the combustion of carbon-based substances and the respiratory process. It's a natural component of the air, which plants utilize in photosynthesis.

Atmosphere

The layer of gases surrounding Earth or another planet, vital for life as it provides oxygen, absorbs ultraviolet solar radiation, and traps heat.