Yahoo Web Search

Search results

1. 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

   • Cached

   Dark Energy and Dark Matter. All the atoms and light in the universe together make up less than five percent of the total contents of the cosmos. The rest is composed of dark matter and dark energy, which are invisible but dominate the structure and evolution of the universe. Dark matter makes up most of the mass of galaxies and galaxy clusters ...

   • Cosmic Microwave Background

     For the first 380,000 years or so after the Big Bang, the...

2. Videos

   • 

     1:4:31

     youtube.com

     What is Dark Matter and Why Does it Matter?

     30 Oct 2018

     333.3K views

   • 

     5:53

     youtube.com

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

     28 Jun 2021

     72.4K views

   • 

     14:36

     youtube.com

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

     19 Jan 2022

     148.9K views

   View all

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

   spaceplace.nasa.gov › dark-matter › en

   • Cached

   Oct 11, 2024 · 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. Together, dark matter and dark energy make up ...

   • 
   • 
   • 
   • 

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

   www.britannica.com › science › dark-matter

   • Cached

   Oct 1, 2024 · The dark matter comprising the other 26.1 percent is in an unfamiliar, nonbaryonic form that is relatively “cold,” or “nonrelativisitic.”. dark matter, 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 ...

   • Author: Adam Riess

   • 

     Understand gravitational lenses and the importance of tracking the dark matter
   • 

     Learn about the dark matter and its gravitational effects
   • 

     Hear about Fritz Zwicky and his discovery of the existence of dark matter

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

   home.cern › science › physics

   • Cached

   Dark matter. 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. In fact, researchers have been able to infer the existence of dark matter only from the gravitational effect it seems to have on visible matter.

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

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

   • Cached

   Dark Matter & Dark Energy. Overview Everything scientists can observe in the universe, from people to planets, is made of matter. 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 ...

7. www.nature.com › articles › d41586/018/05096-yWhat Is Dark Matter? - Nature

   www.nature.com › articles › d41586/018/05096-y

   • Cached

   May 9, 2018 · There is no reason that the matter we see should be the only type of matter there is. The existence of dark matter might be expected and is compatible with everything we know. Perhaps some ...

8. People also ask

   Why is dark matter important?

   • The rest is composed of dark matter and dark energy, which are invisible but dominate the structure and evolution of the universe. Dark matter makes up most of the mass of galaxies and galaxy clusters, and is responsible for the way galaxies are organized on grand scales.

   Dark Energy and Dark Matter | Center for Astrophysics | Harvard

   www.cfa.harvard.edu/research/topic/dark-energy-and-dark-matter

   See all results for this question

   What is dark matter & dark energy?

   • Dark matter makes up most of the mass of galaxies and galaxy clusters, and is responsible for the way galaxies are organized on grand scales. Dark energy, meanwhile, is the name we give the mysterious influence driving the accelerated expansion of the universe.

   Dark Energy and Dark Matter | Center for Astrophysics | Harvard

   www.cfa.harvard.edu/research/topic/dark-energy-and-dark-matter

   See all results for this question

   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/

   See all results for this question

   Why do physicists believe in dark matter?

   • However, they would carry away energy and momentum, so physicists could infer their existence from the amount of energy and momentum “missing” after a collision. Dark matter candidates arise frequently in theories that suggest physics beyond the Standard Model, such as supersymmetry and extra dimensions.

   Dark matter - CERN

   home.cern/science/physics/dark-matter

   See all results for this question

   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

   See all results for this question

   Is there a lot of dark matter?

   • The only way scientists can explain this is if there is a lot of dark matter. Something strange and mysterious creeps throughout the cosmos. Scientists call it dark matter. It is scattered in an intricate web that forms the skeleton of our universe. Dark matter is invisible, only revealing its presence by pushing and pulling on objects we can see.

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

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

   See all results for this question

9. www.sciencefocus.com › space › what-is-dark-matterWhat is dark matter? - BBC Science Focus Magazine

   www.sciencefocus.com › space › what-is-dark-matter

   Dark matter is a mysterious substance that makes up most of the universe's mass but does not emit or absorb light.