what is dark matter , dark energy and black hole
Answers
Answer:
Black things absorb all forms of light and energy, and only emit light/energy dependent on their temperature. Dark things, on the other hand, will absorb light and energy, but won't emit anything at all that's detectable.
Answer:
Dark matter is a form of matter thought to account for approximately 85% of the matter in the universe and about 27% of its total mass–energy density or about 2.241×10−27 kg/m3. ... Most dark matter is thought to be non-baryonic in nature; it may be composed of some as-yet undiscovered subatomic particles.
In physical cosmology and astronomy, dark energy is an unknown form of energy that affects the universe on the largest scales.
A black hole is a region of spacetime where gravity is so strong that nothing—no particles or even electromagnetic radiation such as light—can escape from it. The theory of general relativity predicts that a sufficiently compact mass can deform spacetime to form a black hole
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