Dark Matter and Energy

Sasha Radtke

Dark Matter/Energy

Dark matter and energy is an visible type of matter and energy that, together, is 90% of everything in the universe. Scientists still do not know what either one is made of. Some theories are that it is made of low mass neutrino or theoretical particles like axions or WIMPs. WIMP stands for Weakly Interacting Massive Particles.

Some facts

  • Discovered by Swiss American Fritz Zwicky in 1933
  • Found the mass of stars was only 1% of all the mass
  • Could by that a dark "halo" of gas increasing the mass
  • Detected by bending light rays from distant stars by its gravity or observing the gravitational effect on nearby objects
  • Dark matter makes the universe expand faster and faster
  • Dark energy acts as a glue. It holds the universe together
  • 70% is dark energy
  • 25% is dark matter
  • http://science.nasa.gov/astrophysics/focus-areas/what-is-dark-energy/


  • Feduccia, Alan. "Dark matter." World Book. 2011 ed. 96. Print.
  • Green, Paul. "Dark energy." World Book. 2011 ed. 87. Print.
  • Netting, Ruth. "Dark energy, dark matter." NASA Science. 7 Mar. 2013. Web. 2 Apr. 2013. <science.nasa.gov/astrophysics/focus-areas/what-is-dark-energy/>.
  • Griswold, Britt. "Universe 101." NASA Science. 21 Dec. 2012. Web. 2 Apr. 2013. <map.gsfc.nasa.gov/universe/uni_matter.html>.