I found an answer from www.britannica.com

dark energy | Definition, Discoverers, & Facts | Britannica.com

Mar 7, 2019 ... Dark energy, in contrast to both forms of matter, is relatively uniform in ... of matter in the mass-energy budget of the universe was improbably ...

For more information, see dark energy | Definition, Discoverers, & Facts | Britannica.com

I found an answer from en.wikipedia.org

Dark matter - Wikipedia

Dark matter is a hypothetical form of matter that is thought to account for approximately 85% of ... Dark matter is called dark because it does not appear to interact with observable ... Thus, dark matter constitutes 85% of total mass, while dark energy plus dark matter constitute 95% of total mass–energy content. Because dark ...

For more information, see Dark matter - Wikipedia

I found an answer from spaceplace.nasa.gov

Dark Matter | NASA Space Place – NASA Science for Kids

and dark energy, too! ... there is a lot of it. Dark energy makes up 68%, about two- thirds, of the universe. ... We can see its pull on matter like stars and galaxies.

For more information, see Dark Matter | NASA Space Place – NASA Science for Kids

I found an answer from www.quora.com

What is dark energy? Why does it matter? - Quora

Unfortunately, there are no prevalent good hypothesis or theories concerning dark matter or dark energy. Physicists are at a roadblock, looking for dark matter ...

For more information, see What is dark energy? Why does it matter? - Quora

I found an answer from physics.stackexchange.com

What is dark matter? Also what is dark energy? I am not duplicating ...

It turns out that roughly 68% of the Universe is dark energy. Dark matter makes up about 27%. The rest - everything on Earth, everything ever observed with all of  ...

For more information, see What is dark matter? Also what is dark energy? I am not duplicating ...

I found an answer from science.howstuffworks.com

What are dark matter and dark energy? | HowStuffWorks

NASA's Wilkinson Microwave Anisotropy Probe (WMAP) provided a true watershed moment in humanity's quest to understand the cosmos. Its findings ...

For more information, see What are dark matter and dark energy? | HowStuffWorks

I found an answer from www.scientificamerican.com

What are dark matter and dark energy, and how are they affecting ...

Aug 28, 2006 ... Dark energy and dark matter describe proposed solutions to as yet unresolved gravitational phenomena. So far as we know, the two are distinct ...

For more information, see What are dark matter and dark energy, and how are they affecting ...

I found an answer from science.nasa.gov

Dark Energy, Dark Matter | Science Mission Directorate

It turns out that roughly 68% of the universe is dark energy. Dark matter makes up about 27%. The rest - everything on Earth, everything ever observed with all of ...

For more information, see Dark Energy, Dark Matter | Science Mission Directorate

I found an answer from www.nasa.gov

Dark Energy and Dark Matter | NASA

What Does the Milky Way Weigh? Hubble and Gaia Investigate. Chandra X-ray. Astronomers Find Dark Energy May Vary Over Time. Hubble. Faint Glow Within ...

For more information, see Dark Energy and Dark Matter | NASA

I found an answer from www.nationalgeographic.com

Dark Matter and Dark Energy | National Geographic

Apr 9, 2019 ... Dark matter could also explain certain optical illusions that astronomers see in the deep universe. For example, pictures of galaxies that include ...

For more information, see Dark Matter and Dark Energy | National Geographic

I found an answer from www.smithsonianmag.com

Dark Energy: The Biggest Mystery in the Universe | Science ...

Knowing what dark matter is would help scientists think about how the structure of the universe forms. Knowing what dark energy does would help scientists ...

For more information, see Dark Energy: The Biggest Mystery in the Universe | Science ...

I found an answer from www.britannica.com

dark energy | Definition, Discoverers, & Facts | Britannica.com

Mar 7, 2019 ... Dark energy, in contrast to both forms of matter, is relatively uniform in ... of matter in the mass-energy budget of the universe was improbably ...

For more information, see dark energy | Definition, Discoverers, & Facts | Britannica.com

I found an answer from www.bbc.com

The expanding Universe - AQA - Revision 3 - GCSE Physics (Single ...

The nature of dark energy is still a complete mystery, but it is thought to cause the Universe to expand ... This unknown material has been called dark matter.

For more information, see The expanding Universe - AQA - Revision 3 - GCSE Physics (Single ...

I found an answer from www.ducksters.com

Astronomy for Kids: The Universe

It could be infinitely large. Scientists, however, measure the size of the universe by what they can see. ... What are dark matter and dark energy? We mentioned ...

For more information, see Astronomy for Kids: The Universe