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quasar
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six quasar host galaxies quasar quasar
black holes
quasar and its companion galaxy colliding quasar PKS 2349−014 Quasar 3C 273, the brightest and closest of the quasi-stellar radio sources.
For Students
quasar summary
Quizzes
View of the Andromeda Galaxy (Messier 31, M31).
Astronomy and Space Quiz
The orbits of the planets and other elements of the solar system, including asteroids, Kuiper belt, Oort cloud, comet
Space Odyssey
1 July 2002: The Solar and Heliospheric Observatory (SOHO) satellite reveals a massive solar eruption more than 30 times the Earth's diameter. The eruption formed when a loop of a magnetic field over the surface of the Sun trapped hot gas.
Brightest Star in the Solar System
Nicolaus Copernicus. Nicolas Copernicus (1473-1543) Polish astronomer. In 1543 he published, forward proof of a Heliocentric (sun centered) universe. Coloured stipple engraving published London 1802. De revolutionibus orbium coelestium libri vi.
All About Astronomy
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Galaxy clusters like Abell 2744 can act as a natural cosmic lens, magnifying light from more distant, background objects through gravity. NASA's James Webb Space Telescope may be able to detect light from the first stars in the universe if they are gravitationally lensed by such clusters. (astronomy, space exploration, galaxies)
How Fast Is the Universe Expanding?
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Space race (1957-1969) infographic between United States (U.S.) and Russia. America, Soviet Union, U.S.S.R., space exploration
Timeline of the Space Race, 1957–69
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Aphrodite. Greek mythology. Sculpture. Aphrodite is the Greek goddess of love and beauty.
12 Greek Gods and Goddesses
The Battle of New Orleans, by E. Percy Moran, c. 1910. Andrew Jackson, War of 1812.
26 Decade-Defining Events in U.S. History
Chapter 4 pg 42 - Chapter header of The Adventures of Tom Sawyer by Mark Twain. Published in 1884 by The American Publishing Company
Periods of American Literature

quasar: References & Edit History

Article Contributors

Primary Contributors

Other Encyclopedia Britannica Contributors

Article History

Type Description Contributor Date
Add new Web site: BCcampus Open Publishing - Douglas College Astronomy 1105 - Quasars as Probes of Evolution in the Universe. Sep 26, 2024
Add new Web site: California Institute of Technology - Department of Astronomy - The Origins and the Early Evolution of Quasars and Supermassive Black Holes. Apr 05, 2024
Add new Web site: BCCampus Publishing - Douglas College Astronomy 1105 - Quasars. Jan 25, 2024
Add new Web site: University of Central Florida Pressbooks - Astronomy - Quasar. Dec 07, 2023
Add new Web site: The Nine Planets - Quasars. Oct 13, 2023
Video and links added. May 31, 2023
Add new Web site: Khan Academy - Quasar. Feb 18, 2023
Add new Web site: Physics LibreTexts - Quasar. Sep 23, 2022
Add new Web site: StarDate - Quasar. Apr 22, 2022
Add new Web site: Space.com - Quasars. Jun 15, 2019
Add new Web site: Kids Astronomy - The Universe - Quasar. May 09, 2017
Add new Web site: Swinburne University of Technology - COSMOS - The SAO Encyclopedia of Astronomy - Quasar. Mar 11, 2013
Add new Web site: Everyday Cosmology - Maarten Schmidt Discovers Quasars. Aug 06, 2012
Article thoroughly revised. May 06, 2010
Added new Web site: Sea and Sky - Quasars. Apr 16, 2009
Article revised. Feb 27, 2009
Article revised and updated. Dec 12, 2007
Article added to new online database. Jul 20, 1998
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