"NASA Imagine the Universe. January 1999. "The Wilkinson Microwave Anisotropy Probe (WMAP)." August 2002. Dark matter emits no light, and cannot be directly observed, but scientists think that it and dark energy make up most of the mass of the universe. (Nov. 13, 2012) http://discovermagazine.com/2012/jun/03-largest-map-of-dark-matter-across-the-cosmos/?searchterm=dark%20matterHenry, J. Patrick et al. Scientists study dark matter by looking at the effects it has on visible objects. They figured out the location of those concentrations by using gravitational lensing. (Dec. 18, 2012) http://www.nasa.gov/mission_pages/hubble/news/dark_matter_ring_mm.htmlNASA. Aug. 22, 2006. This composite image of the merging galaxy cluster Abell 520 has superimposed, "false-colored" maps that show the cluster's concentration of starlight (orange), hot gas (green) and dark matter (much of the blue).

Dark matter is composed of particles that do not absorb, reflect, or emit light, so they cannot be detected by observing electromagnetic radiation. This might be a surprise, but we don’t know what most of the universe is made of.

"Dark Matter." Oct. 22, 2003. The lead candidate, "One of the outstanding questions is whether there is a pattern to the fractions that go into each neutrino species," Tyce DeYoung, an associate professor of physics and astronomy at Michigan State University and a collaborator on the The smaller neutral axion and the uncharged photinos — both theoretical particles — are also potential placeholders for dark matter.Or, perhaps the laws of gravity that have thus far successfully described the motion of objects within the solar system require revision.If scientists can't see dark matter, how do they know it exists?Scientists calculate the mass of large objects in space by studying their motion. You're looking at arguably one of the best maps of dark matter that we have. "Does Dark Matter Really Exist?" Some folks spend their whole lives trying to keep it,Amos, Jonathan. Dark matter is a theorized form of matter that exists in our universe. Matter that emits little or no detectable radiation of its own, postulated to account for observed gravitational forces that affect astronomical objects but have no observable sources. That only leaves a small 5% for all the matter and energy we know and understand. "WMAP Cosmology 101: What is the Universe Made of?" Please deactivate your ad blocker in order to see our subscription offerThis Hubble Space Telescope composite image shows a ghostly "ring" of dark matter in the galaxy cluster Cl 0024+17.
(Dec. 18, 2012) http://www.lbl.gov/Science-Articles/Archive/sabl/2006/Jan/Rubin-Dark-Matter.pdfSample, Ian. (Dec. 18, 2012) http://map.gsfc.nasa.gov/m_uni/uni_101matter.htmlNASA Goddard Space Flight Center Remote Sensing Tutorial Section 20.

article last updated June 27, 2019 (Dec. 18, 2012) http://www.astro.washington.edu/labs/clearinghouse/labs/Darkmatter/index.htmlWhite, Martin, professor of physics. (Nov. 13, 2012) http://chandra.harvard.edu/photo/2012/a383/NASA. "The Science of Infinity." 1998. Thanks, Hubble. Scientific American. "Dark Matter Is an Illusion, New Antigravity Theory Says." Together, dark energy and dark matter make up 95% of the universe. (Image credit: Karl Tate, Space.com Infographics Artist)Receive mail from us on behalf of our trusted partners or sponsors? (Dec. 18, 2012) http://chandra.harvard.edu/chronicle/0403/dark/index.htmlChandra X-ray Observatory. Astronomers know it exists because something in the universe is exerting significant gravitational forces on things we can see.
"A Teacher's Guide to the Universe."

May 13, 2012. "Dark Matter." And we don’t fully understand what it is.When scientists study our universe, they see that it’s expanding.

"The Age of the Universe, Dark Matter, and Structure Formation." (Dec. 18, 2012) http://www.astro.umd.edu/~ssm/mond/sad0802Milg6p.pdfMiller, Chris.

We also share information about your use of our site with our social media, advertising and analytics partners who may combine it with other information that you’ve provided to them or that they’ve collected from your use of their services. dark matter synonyms, dark matter pronunciation, dark matter translation, English dictionary definition of dark matter. "Dark Matter Search Results from the CDMS II Experiment." "Has dark matter finally been detected?" Cham Ghag, a physicist at University College London and collaborator on LUX, said in a statement. Aug. 1, 2006. "Chandra's Find of Lonely Halo Raises Questions About Dark Matter." National Geographic. © So maybe dark matter is a different object we haven’t observed at all yet, something called a neutralino.

(Dec. 18, 2012) http://imagine.gsfc.nasa.gov/docs/features/exhibit/map_exhibit.htmlNASA Imagine the Universe.


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