Dark matter is a hypothetical form of matter that is believed to exist in the universe. Unlike ordinary matter, which makes up everything we see and interact with, dark matter does not interact with electromagnetic radiation and cannot be directly observed.
The existence of dark matter is inferred based on its gravitational effects on visible matter and the structure of the universe. Observations of galaxies and galaxy clusters show that their gravitational forces are stronger than can be accounted for by the visible matter alone. Dark matter is thought to be responsible for this additional gravitational influence, holding galaxies together and contributing to the formation and evolution of large-scale cosmic structures.
Despite its name, dark matter is not necessarily "dark" in a visual sense. It is called dark because it does not emit, absorb, or reflect light, making it extremely difficult to detect using conventional telescopes. Scientists believe dark matter could be composed of subatomic particles, such as hypothetical particles called Weakly Interacting Massive Particles (WIMPs), but its exact nature remains unknown.
Efforts to understand dark matter are ongoing, including experiments conducted in underground laboratories and the use of high-energy particle accelerators to search for potential dark matter particles. Understanding the nature and properties of dark matter is crucial to explaining the structure and behavior of the universe at both the galactic and cosmological scales.
(in some cosmological theories) non-luminous material that is postulated to exist in space and that could take any of several forms including weakly interacting particles ( cold dark matter ) or high-energy randomly moving particles created soon after the Big Bang ( hot dark matter ).
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Answer:
Dark matter is a hypothetical form of matter that is believed to exist in the universe. Unlike ordinary matter, which makes up everything we see and interact with, dark matter does not interact with electromagnetic radiation and cannot be directly observed.
The existence of dark matter is inferred based on its gravitational effects on visible matter and the structure of the universe. Observations of galaxies and galaxy clusters show that their gravitational forces are stronger than can be accounted for by the visible matter alone. Dark matter is thought to be responsible for this additional gravitational influence, holding galaxies together and contributing to the formation and evolution of large-scale cosmic structures.
Despite its name, dark matter is not necessarily "dark" in a visual sense. It is called dark because it does not emit, absorb, or reflect light, making it extremely difficult to detect using conventional telescopes. Scientists believe dark matter could be composed of subatomic particles, such as hypothetical particles called Weakly Interacting Massive Particles (WIMPs), but its exact nature remains unknown.
Efforts to understand dark matter are ongoing, including experiments conducted in underground laboratories and the use of high-energy particle accelerators to search for potential dark matter particles. Understanding the nature and properties of dark matter is crucial to explaining the structure and behavior of the universe at both the galactic and cosmological scales.
Answer:
dark matter
/ˌdɑːk ˈmatə,ˈdɑːk ˌmatə/

noun
ASTRONOMY
(in some cosmological theories) non-luminous material that is postulated to exist in space and that could take any of several forms including weakly interacting particles ( cold dark matter ) or high-energy randomly moving particles created soon after the Big Bang ( hot dark matter ).
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