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What is an accretion disc?

Answer 1

A collection of matter accumulated by mutual gravitational attraction of the masses. It often forms a disc shape due to angular momentum.

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Answer 2

John Alexander

A structure known as an accretion disc is created when matter—such as gas, dust, or debris—accumulates around a central object—typically a black hole or star—due to the force of gravity.

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Answer from HIX Tutor

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.