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Because - scientists have estimated that the mass of the universe should be more than it apparently is. Ttherefore the only logical explanation to explain the difference is 'dark matter' (until they find something more 'concrete' to provide an answer.!
What else can I help you with?
Is it true dark matter cannot be seen?
Yes this is true. We have recently discovered dark matter exists with the help of the Hadron particle collider, but can not see dark matter. (not yet any way)
What had Astronomers have been unable to prove that it exists?
'Dark matter' and 'dark energy' have not been observed or proven yet.
What are some unique info?
What exists at the center of a black hole. Why is dark matter unaffected by photons. What is dark energy. Examples...
Why do astronomers think there is dark matter in the universe?
That is because the dark matter attracts normal matter through its gravitation.
What is dark matter and what exists for it?
We know that dark matter exists because it got gravity, though it is invisible. It hold galaxy and Universe. There is a theory there many other parallel universe outside our universe and dark matter holds those universe up and some scientists says that dark matter are just mass of the matter of the parallel universe. It sounds crazy but that is the Law of Physics. However there is not exact explanation of what dark matter really is, so there are still Noble Prices for those who can come up with a reasonable explanation
Is dark matter a reality or made up becauseof the lack of matter in the univrse?
There is a lack of OBSERVED matter, but it is quite clear (due to gravitational effects), that dark matter indeed exists. There are all kinds of pieces of evidence in favor of dark matter. It isn't known yet what it is made of.
Measure of the quantity of matter that exists in an object?
i think mass :)
Do scientist think that dark matter and dark energy exist?
Yes, they do.
How many people believe dark matter exists?
Dark Matter is required to exist because without it all galaxies would fly apart. In our Milky Way Galaxy Dark Matter accounts for 90% of the entire mass of the galaxy. Dark Matter is simply that, Dark. As it cannot be seen and has a very weak force. It only interacts with gravity.
What does most matter in the universe exist in?
Most matter in the universe exists in the form of dark matter and dark energy, which are currently not fully understood by scientists. These two components make up the majority of the universe's mass-energy content, with ordinary matter (protons, neutrons, electrons) making up only a small percentage.
Could you walk through a wall made up of dark matter?
Dark matter is a mysterious substance that does not interact with regular matter, so it is unlikely you would be able to walk through a wall made of dark matter. Our current understanding of dark matter is that it exists in a halo around galaxies and does not clump together like regular matter to form solid structures like walls.
What could be the possible exists between galaxies?
Dust, gas, dark matter, perhaps individual stars and planets.
