How do we know dark matter must exist in the Milky Way? Physicists have observed
ID: 637579 • Letter: H
Question
How do we know dark matter must exist in the Milky Way?
Physicists have observed that gravity does not follow Newton's law at large distances.
Physicists have created dark matter in the lab and it matches the spectra of stars.
Stars orbit a lot faster than they should, based on the mass of stars in the galaxy.
Dark matter has been observed to glow in sub-millimeter light.
Dark matter blocks parts of our view of the sky, like dust blocks our view of the Milky Way.
Physicists have observed that gravity does not follow Newton's law at large distances.
Physicists have created dark matter in the lab and it matches the spectra of stars.
Stars orbit a lot faster than they should, based on the mass of stars in the galaxy.
Dark matter has been observed to glow in sub-millimeter light.
Dark matter blocks parts of our view of the sky, like dust blocks our view of the Milky Way.
Explanation / Answer
Stars orbit a lot faster than they should , based on the mass of stars in the galaxy.
Every object in the universe attracts other matter because of gravitation.
The gravitation keeps normal attraction between the objects and hence stars attracts other stars in the normal force of attraction
But the stars are moving faster than it should be. It is only because of some extra matter present in between the objects which creates extra gravitational force and hence attracts faster .
This dark matter can be a gases, black holes etc.
By looking the sky in night we can observe that dark matter or black side is much more than the bright matter or calestial bodies.
Hence the objects in the universe are moving faster than normal speed.
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