Why Can't Dark Matter Halos Collapse to Be the Same

question 13

Multiple Choice

Why can't dark matter halos collapse to be the same size as the visible parts of galaxies?

• A) Dark matter can't dissipate its energy through collisions.
• B) Dark matter is mostly made of mini-black holes.
• C) Dark matter has much more angular momentum.
• D) Dark matter annihilates when it begins to get that dense.

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Definitions:

Neurotransmitter Effects

The impacts or actions exerted by neurotransmitters, which are chemicals responsible for transmitting signals across a chemical synapse between neurons or between neurons and muscles.

Receptors

Proteins located on the surface of or within cells, which bind to specific molecules, triggering a physiological response.

Postsynaptic Cell

A neuron or muscle cell that receives signals from a presynaptic neuron at a synapse.

Neuromodulator

Substance that influences the sensitivity of neurons to neurotransmitters but neither strongly stimulates nor strongly inhibits neurons by itself.