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There are clusters of galaxies, and the space between them is filled with hot gas, which can only be seen as X-rays or gamma rays.

When measuring how much gas there is between those galaxies, scientists realized that the material should be around five times what can be detected. That undetected matter is known as dark matter.

Dark matter simply means the things that can be found in space which has gravity but cannot be seen.

  • It should be noted that dark matter is formed from tiny particles which have low mass. About ninety-five percent of the universe is made up of dark matter and energy.

  • Dark matter simply means the mass that is in the universe which we cannot see. These materials cannot be seen or observed by scientists.

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