Dark Matter
A form of matter that does not emit light and does not interact significantly with electromagnetic radiation, but influences the motion of visible matter through gravity. It accounts for about 27% of the universe's total energy density.
Timeline (last 90 days)
Astronomers indirectly infer the existence and distribution of dark matter through multiple means such as gravitational lensing, the temperature distribution of X-ray gas, and galaxy velocity dispersion.
Dark matter accounts for about 27% of the universe's total energy density.
The velocity dispersion of galaxies in galaxy clusters can reach about 1000 km/s, requiring dark matter to provide additional gravity to maintain the binding.
Dark matter provides additional gravitational force that keeps galactic rotation speeds far exceeding what visible matter can account for, thereby maintaining the structural stability of galaxies.
In the total matter-energy composition of the universe, dark matter accounts for approximately 27% and ordinary baryonic matter for approximately 5%.
It is estimated that billions of dark matter particles are passing through the human body without leaving any readable trace.
Whether dark matter has extremely weak non-gravitational interactions remains an open question, and multiple experimental teams around the world are still investigating it.
Gravitational lensing, simulations of large-scale structure formation in the universe, and cosmic microwave background radiation measurements all independently point to the conclusion that dark matter exists.
Philosopher Siska DeBardamaker proposed that it is entirely possible for dark matter to interact only through gravity.
If dark matter only participates in gravitational interactions, it would be unable to leave any detectable signal in detectors on Earth.
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All Facts (11)
Astronomers indirectly infer the existence and distribution of dark matter through multiple means such as gravitational lensing, the temperature distribution of X-ray gas, and galaxy velocity dispersion.
50%UnverifiedDark matter accounts for about 27% of the universe's total energy density.
50%UnverifiedThe velocity dispersion of galaxies in galaxy clusters can reach about 1000 km/s, requiring dark matter to provide additional gravity to maintain the binding.
50%UnverifiedDark matter provides additional gravitational force that keeps galactic rotation speeds far exceeding what visible matter can account for, thereby maintaining the structural stability of galaxies.
50%UnverifiedIn the total matter-energy composition of the universe, dark matter accounts for approximately 27% and ordinary baryonic matter for approximately 5%.
50%UnverifiedIt is estimated that billions of dark matter particles are passing through the human body without leaving any readable trace.
50%UnverifiedWhether dark matter has extremely weak non-gravitational interactions remains an open question, and multiple experimental teams around the world are still investigating it.
50%UnverifiedGravitational lensing, simulations of large-scale structure formation in the universe, and cosmic microwave background radiation measurements all independently point to the conclusion that dark matter exists.
50%UnverifiedPhilosopher Siska DeBardamaker proposed that it is entirely possible for dark matter to interact only through gravity.
50%UnverifiedIf dark matter only participates in gravitational interactions, it would be unable to leave any detectable signal in detectors on Earth.
50%UnverifiedApproximately 95% of the observable universe is composed of dark matter and dark energy that cannot be directly detected, and physicists have yet to explain their nature
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