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Dark Matter Of The Universe
Dark Matter is a bizarre, unknown ingredient of the universe, which scientists cannot observe directly, but takes up 80 percent of the mass of the universe.
It is not seen by the naked eye as it does not emit light or energy. There are entire galaxies (like Dragonfly 44) that are made up entirely of dark matter. Scientists use particle detectors to detect cosmic rays, energy patterns, gravity, and positrons (anti-electrons) to research dark matter.
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Baryonic And Non-Baryonic Matter
- Familiar material of the universe contains protons, neutrons and electrons, also known as Baryonic Matter.
- Dark matter is made up of the same plus also non-baryonic matter (neutrinos, free electrons, supersymmetric particles, axions, and black holes) which is hard to detect.
- The objects of the universe that may contribute to dark matter are dim brown dwarf stars, white dwarf stars and neutron stars.
- Supermassive black holes, the size of which is 21 billion times the mass of our Sun, can make up a lot of dark matter by themselves.
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Proof That Dark Matter Exists
The way massive objects of the universe bend and distort gravity and light indicates to scientists about the existence of dark matter. The way large objects move about in the universe (velocity) also is a factor pushing towards the probability of much more mass than is visible.
Dark matter provides the gravity and weight in galaxies, which would fall apart if all they had was what is visible to scientists via their various instruments.
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The Instruments Of Observing Dark Matter
Particle detectors and other dark matter detecting projects prove the universal interest in dark matter:
- From Italy, a particle detector named XENON1T is hunting for dark matter with an ultra-low background.
- From South Dakota, the Large Underground Xenon Dark-Matter Experiment (LUX) is hunting for weakly interacting massive particles (WIMP).
- IceCube Neutrino Observatory is situated under Antarcticaβs ice, hunting for sterile neutrinos.
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Dark Matter Vs Dark Energy
Apart from dark matter, the universe is full of energy, most of which is dark energy.
New data shows that the universe is not running out of energy like previous theories claimed, but is actually expanding at an accelerated rate.
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