Spergel, David N. Department of Astrophysical Sciences, Princeton University, Princeton, New Jersey.
Last reviewed:October 2017
Show previous versions
- Astronomical evidence for dark matter
- Novel nature of dark matter
- Dark matter candidates
- Links to Primary Literature
- Additional Readings
Particles or objects that exert a gravitational force but do not emit any detectable visible light or other electromagnetic radiation of any kind. Dark matter is the dominant form of matter in our Galaxy and in the universe. Astronomers have inferred the presence of dark matter through its gravitational effects and have shown that dark matter is not composed of ordinary atoms. Particle physicists have suggested several plausible candidates for dark matter; ongoing and planned experiments are capable of detecting these new particles. There are controversial claims of dark-matter detection. If our understanding of gravity as explained by Albert Einstein’s theory of general relativity is correct, as a century’s-worth of experiments have verified with ever-increasing precision, then dark matter must exist. However, it is possible that relativity is not correct, and a new physics paradigm will be needed to solve the mystery of dark matter. See also: Elementary particle; Gravity; Relativity; Universe
The content above is only an excerpt.
for your institution. Subscribe
To learn more about subscribing to AccessScience, or to request a no-risk trial of this award-winning scientific reference for your institution, fill in your information and a member of our Sales Team will contact you as soon as possible.
to your librarian. Recommend
Let your librarian know about the award-winning gateway to the most trustworthy and accurate scientific information.
AccessScience provides the most accurate and trustworthy scientific information available.
Recognized as an award-winning gateway to scientific knowledge, AccessScience is an amazing online resource that contains high-quality reference material written specifically for students. Contributors include more than 9000 highly qualified scientists and 43 Nobel Prize winners.
MORE THAN 8500 articles and Research Reviews covering all major scientific disciplines and encompassing the McGraw-Hill Encyclopedia of Science & Technology and McGraw-Hill Yearbook of Science & Technology
115,000-PLUS definitions from the McGraw-Hill Dictionary of Scientific and Technical Terms
3000 biographies of notable scientific figures
MORE THAN 19,000 downloadable images and animations illustrating key topics
ENGAGING VIDEOS highlighting the life and work of award-winning scientists
SUGGESTIONS FOR FURTHER STUDY and additional readings to guide students to deeper understanding and research
LINKS TO CITABLE LITERATURE help students expand their knowledge using primary sources of information