Pictures from Google Image Search

radio galaxy

A Dictionary of Astronomy | 1997 | © A Dictionary of Astronomy 1997, originally published by Oxford University Press 1997. (Hide copyright information) Copyright

radio galaxy A galaxy that is an unusually powerful emitter of radio waves. The output of a radio galaxy can be up to 1038 watts, a million times greater than a normal galaxy such as our own. Radio galaxies have a compact radio nucleus coincident with the core of the visible parent galaxy, a pair of opposed jets emerging from the nucleus, and a pair of lobes (1) far outside the visible confines of the galaxy. The galaxy is almost always a giant elliptical, which may be the result of the collision and merger of two or more smaller galaxies. The source of the radio galaxy's energy is believed to be a massive black hole in the galactic nucleus from which the jets emerge, delivering energy to the lobes. Notable radio galaxies include Centaurus A, Cygnus A, and Virgo A.

Cite this article
Pick a style below, and copy the text for your bibliography.

  • MLA
  • Chicago
  • APA

"radio galaxy." A Dictionary of Astronomy. 1997. Encyclopedia.com. 15 Nov. 2009 <http://www.encyclopedia.com>.

"radio galaxy." A Dictionary of Astronomy. 1997. Encyclopedia.com. (November 15, 2009). http://www.encyclopedia.com/doc/1O80-radiogalaxy.html

"radio galaxy." A Dictionary of Astronomy. 1997. Retrieved November 15, 2009 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O80-radiogalaxy.html

Learn more about citation styles

Related newspaper, magazine, and trade journal articles from HighBeam Research

(Including press releases, facts, information, and biographies)

Modern pentathlon interview opportunities ahead of key World Championships.
M2 Presswire; 5/9/2008; 700+ words ; M2 PRESSWIRE-9 May 2008-Pentathlon GB: Modern pentathlon interview opportunities ahead of key World Championships...Championships will be announced at a press conference at the Pentathlon GB high performance centre at the University of Bath...
San Antonio groups work to rebuild American interest in the pentathlon.
Newspaper article from: San Antonio Express-News (San Antonio, TX); 7/13/2005; 700+ words ; ...Travis E. Poling Jul. 13--The modern pentathlon is an Olympic event of endurance and...revive U.S. competitiveness in the pentathlon. Several groups -- including two in...decision on who will oversee modern pentathlon in the U.S. is expected at the end...
FILM STAR TAKES ROLE OF SAVING PENTATHLON.(Sports)
Newspaper article from: Rocky Mountain News (Denver, CO); 4/12/1996; ; 700+ words ; ...IV is doing his best to help modern pentathlon gain recognition and remain in the Olympics...He starred in a 1993 movie called Pentathlon. Several of the film's technical...interested in the sport, too. Modern pentathlon is in trouble. The sport - which combines...
Beijing 2008 - Modern Pentathlon by the numbers.
News Wire article from: UzReport; 8/20/2008; 553 words ; ...com): A preview on the Modern Pentathlon competition at the Beijing 2008...Year in which the women's Modern Pentathlon was added to the Olympic curriculum. 1912 -- Year in which Modern Pentathlon was introduced to the Olympic stage...
Pentathlon keeps its name despite change in number Olympics
Newspaper article from: International Herald Tribune; 11/28/2008; ; 700+ words ; ...International Herald Tribune 11-28-2008 Pentathlon keeps its name despite change in number...horse jumping and running - the modern pentathlon has seemed less than modern. And now...about to become something less than a pentathlon. Shooting and running will be combined...
Pentathlon Is a Bit of Everything, Plus Luck; Five Sports in One Day, With Countless Pitfalls
Newspaper article from: The Washington Post; 8/27/2004; ; 700+ words ; ...into him at the start of the modern pentathlon eight hours earlier. He had a single...and because this was his farewell to pentathlon, he wanted to get on the bus. But...nag. This happened Thursday in the pentathlon's outdoor arena at the Goudi Olympic...
Pentathlon supporters await vote that could kill their sport
News Wire article from: AP Worldstream; 11/28/2002; ; 700+ words ; ...movement created the sport of modern pentathlon. Now the Olympic movement may kill...scheduled to vote Friday on whether modern pentathlon should be excluded from the 2008 Beijing...of the International Union of Modern Pentathlon. The sun will go away and will never...
From ancient to modern, pentathlon tests the all-rounders
News Wire article from: AP Worldstream; 8/25/2004; ; 700+ words ; ...perfect sportsmen" who competed in the pentathlon at the ancient Olympic Games. The event...Times have changed. Nowadays the modern pentathlon is struggling even to maintain its place...period of time. "I really believe that pentathlon is the most difficult sport," said...
Sport on the edge: Obscure pentathlon could vanish from Olympics.(Sports)
Newspaper article from: The Washington Times; 7/31/1996; ; 700+ words ; ...It's confusingly called the modern pentathlon, and an anonymous collection of colorful...s possible extinction. "The modern pentathlon has to be the ultimate test of both...executive director of the U.S. Modern Pentathlon Association, before the competition...
Prospected Modern Pentathlon
Newspaper article from: Xinhua English Newswire; 7/30/1997; 363 words ; Modern Pentathlon will remain in the Olympic programme in the...attache of the International Union of Modern Pentathlon and Biathlon (IUPMB), said here on Wednesday. "Modern pentathlon has a unique place because it is the only sport...

Related entries from encyclopedias, dictionaries, and thesauruses

pentathlon
Book article from: The Oxford Dictionary of Phrase and Fable pentathlon an athletic event comprising five different events for each competitor...discus-throwing, spear-throwing, and wrestling; now, (also modern pentathlon ) an event involving fencing, shooting, swimming, riding, and cross...
Athletics
Book article from: -Ologies and -Isms ...and discus throw. Cf. heptathlon, pentathlon, triathlon . discobolus 1. a discus...and shot-put. Cf. decathlon, pentathlon, triathlon. isometrics a form of physical...x2014;pancratiastic, adj. pentathlon 1. Track and Field, an athletic contest...
Joyner-Kersee, Jackie
Book article from: Notable Sports Figures ...person she beat in a race. First Pentathlon Win When she was 14, she won...four consecutive national junior pentathlon championships. During those years...four consecutive national junior pentathlon championships 1980-84 Attends...
Jim Thorpe
Book article from: The Columbia Encyclopedia, Sixth Edition ...broad jump and the 200-meter and 1,500-meter runs of the pentathlon; won the shot put, the 1,500-meter run, and the hurdle...decathlon; and was the runner-up in the other events of the pentathlon and decathlon. In 1913, however, Thorpe surrendered his...
decathlon
Book article from: The Columbia Encyclopedia, Sixth Edition ...Bruce Jenner and the British Daley Thompson. The ancient pentathlon , a five-event contest, resembled the modern decathlon...of seven track-and-field events. Begun as an Olympic pentathlon in 1964, it was expanded in 1984 and now includes the long...

Find thousands of answers for hundreds of subjects at Smart QandA .

All answers verified by trusted sources at Encyclopedia.com

Try Smart QandA now!

For students and teachers!

Encyclopedia.com provides students and teachers facts, information, and biographies from verified, citable sources, including:

Encyclopedia.com provides students and teachers facts, information, and biographies from verified, citable sources, including: