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   dark matter

   /ˌdɑːk ˈmatə/

   noun

   • 1. (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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2. People also ask

   What is dark matter & dark energy?

   • Matter is defined as any substance that has mass and occupies space. But there’s more to the universe than the matter we can see. Dark matter and dark energy are mysterious substances that affect and shape the cosmos, and scientists are still trying to figure them out. Does Distant Planet Host Volcanic Moon Like Jupiter’s Io?

   Dark Matter & Dark Energy - Science@NASA

   science.nasa.gov/universe/dark-matter-dark-energy/

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   What are the different types of dark matter?

   • Forms of dark matter Baryonic dark matter Cold dark matter Hot dark matter Light dark matter Mixed dark matter Warm dark matter Self-interacting dark matter Scalar field dark matter Primordial black holes Hypothetical particles

   Dark matter - Wikipedia

   en.wikipedia.org/wiki/Dark_matter

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   What makes dark matter elusive?

   • Scientists believe that the key to its elusive nature lies in its composition. Visible matter, also called baryonic matter, consists of baryons — an overarching name for subatomic particles such as protons, neutrons and electrons. Scientists only speculate what dark matter is made of.

   What is dark matter? | Space

   www.space.com/20930-dark-matter.html

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   What is dark matter & why is it important?

   • Dark matter is that invisible glue that keeps stars, dust, and gas together in a galaxy. This mysterious substance makes up the majority of a galaxy's mass and forms the foundation of our Universe's structure. Dark matter is still one of the greatest mysteries of science. Credit: NASA/JPL-Caltech

   What Is Dark Matter? | NASA Space Place – NASA Science for Kids

   spaceplace.nasa.gov/dark-matter/en/

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   Does dark matter outweigh visible matter?

   • Dark matter seems to outweigh visible matter roughly six to one, making up about 27% of the universe. Here's a sobering fact: The matter we know and that makes up all stars and galaxies only accounts for 5% of the content of the universe! But what is dark matter?

   Dark matter - CERN

   home.cern/science/physics/dark-matter

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   Does dark matter have gravity?

   • The Short Answer: Dark matter is stuff in space that has gravity, but it is invisible and isn’t like anything else we know about. Dark matter makes up about 27% of the universe. Dark energy makes up roughly 68% of the universe. We don’t know much about dark energy either, but we do know there is a lot of it.

   What Is Dark Matter? | NASA Space Place – NASA Science for Kids

   spaceplace.nasa.gov/dark-matter/en/

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3. en.wikipedia.org › wiki › Dark_matterDark matter - Wikipedia

   en.wikipedia.org › wiki › Dark_matter

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   Dark matter is a hypothetical form of matter that does not interact with light or other electromagnetic radiation, but only through gravity. It is implied by gravitational effects that cannot be explained by general relativity, and constitutes 85% of the total mass of the universe.

4. www.britannica.com › science › dark-matterDark matter | Definition, Discovery, Distribution, & Facts ...

   www.britannica.com › science › dark-matter

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   Oct 1, 2024 · Dark matter is a component of the universe whose presence is discerned from its gravitational attraction rather than its luminosity. It makes up 30.1 percent of the matter-energy composition of the universe and has two varieties: baryonic and nonbaryonic.

   • Author: Adam Riess

   • Dark matter is a component of the universe whose presence is discerned from its gravitational attraction rather than its luminosity.
   • Dark matter makes up 30.1 percent of the matter-energy composition of the universe. The rest is dark energy (69.4 percent) and “ordinary” visible m...
   • Dark matter’s existence was first inferred by Swiss American astronomer Fritz Zwicky, who in 1933 discovered that the mass of all the stars in the...
   • Two varieties of dark matter have been found to exist. The first variety is about 4.5 percent of the universe and made of the familiar baryons (i.e...

5. spaceplace.nasa.gov › dark-matter › enWhat Is Dark Matter? | NASA Space Place – NASA Science for Kids

   spaceplace.nasa.gov › dark-matter › en

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   Oct 11, 2024 · Dark matter is that invisible glue that keeps stars, dust, and gas together in a galaxy. This mysterious substance makes up the majority of a galaxy's mass and forms the foundation of our Universe's structure. Dark matter is still one of the greatest mysteries of science. Credit: NASA/JPL-Caltech.

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6. Videos

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     youtube.com

     What Is Dark Matter? An Astrophysicist Explains | Edge Of Knowledge ...

     19 Jan 2022

     148.9K views

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     5:53

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     Dark Matter Explained: What Exactly is Dark Matter? | A Beginner’s Guide to Dark Matter

     28 Jun 2021

     72.9K views

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     56:47

     youtube.com

     What is dark matter? – with Peter Fisher

     5 Jan 2023

     244.8K views

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7. home.cern › science › physicsDark matter - CERN

   home.cern › science › physics

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   Dark matter is invisible matter that does not interact with light and accounts for most of the universe's mass. It may be composed of supersymmetric particles or exist in a parallel world called the Hidden Valley. Learn more about dark matter and its role in galaxy formation and dark energy.

8. science.nasa.gov › universe › dark-matter-dark-energyDark Matter & Dark Energy - Science@NASA

   science.nasa.gov › universe › dark-matter-dark-energy

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   Learn about the mysterious substances that affect and shape the cosmos, and how scientists are still trying to figure them out. Explore stories, images, and articles about dark matter and dark energy on NASA's website.

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10. www.space.com › 20930-dark-matterWhat is dark matter? | Space

    www.space.com › 20930-dark-matter

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    Aug 6, 2024 · Dark matter is the invisible stuff that makes up 80% of the universe and affects its gravity. Learn about the possible types of dark matter, how scientists study it and why it is important for cosmology.

11. www.cfa.harvard.edu › dark-energy-and-dark-matterDark Energy and Dark Matter | Center for Astrophysics ...

    www.cfa.harvard.edu › dark-energy-and-dark-matter

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    Dark matter is invisible but dominant mass in the universe, affecting the structure and evolution of galaxies and clusters. Learn how astronomers observe, model and measure dark matter using various methods and instruments.