2022-09-04 16:16:24
Dark Matter•
What is dark matter?— Dark matter is a hypothetical form of matter and component of the universe whose presence is discerned from its gravitational attraction rather than its luminosity.
In simple terms, Dark matter is composed of particles that do not absorb, reflect, or emit light, so they cannot be detected by observing electromagnetic radiation.
(Dark matter makes up about 85 percent of the total matter in the universe, accounting for more than five times as much as all ordinary matter. )
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What is dark matter made of?—It could be composed of baryons but it could also be non-baryonic, that means consisting of different types of particles. Most scientists think that dark matter is composed of non-baryonic matter.(Explained by Scientists)
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Purposes of Dark Matter▸Dark matter plays an important role in the formation of galaxies
▸Understanding dark matter is important to understand the size, shape and future of the universe.
▸The amount of dark matter in the universe will determine if the universe is open (continues to expand), closed (expands to a point and then collapses) or flat (expands and then stops when it reaches equilibrium).
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Some effects of Dark Matter▸According to cosmologists' prevailing theory, dark matter pervades pretty much every galaxy, providing the extra gravity that keeps stars from swirling out into space, given the speeds at which astronomers see the galaxies rotating.
▸Unlike normal matter, dark matter does not interact with the electromagnetic force. This means it does not absorb, reflect or emit light, making it extremely hard to spot.
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What would happen if there was no dark matter?— Without dark matter, galaxies would lose a large fraction of the gas that forms new stars immediately after the first major star-forming event they experienced. (As of scientists Explanations)
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What happens if dark matter touches matter?— Dark matter particles can penetrate all other forms of matter, which means that they may even be able to traverse right through our planet without losing any energy whatsoever. On the other hand, their impact with ordinary matter that Earth is comprised of may hamper them slightly, resulting in a loss of energy.
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Can dark matter be used as fuel?—Scientists Says Dark Matter Could Likely Be Incredible Fuel for Spacecraft
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What are the 3 main characteristics of dark matter?—Dark matter is dark: It emits no light and cannot be seen directly, so it cannot be stars or planets. Dark matter is not antimatter: Antimatter annihilates matter on contact, producing gamma rays. Astronomers do not detect them. Dark matter is not black holes: Black holes are gravity lenses that bend light.
Note: Used various sources to prepare this.
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