Radio Galaxies

A particular type of active galaxy that emits more light at radio wavelengths than at visible wavelengths, also known as a radio-luminous galaxy or radio-loud galaxy. Radio galaxies are driven by non-thermal emission. Radio telescopes show that some radio galaxies, called extended radio galaxies, have lobes of radio emission extending millions of light-years from their nuclei. Centaurus A is a nearby example of an extended radio galaxy that features two outer lobes 650,000 and 1,350,000 light-years in diameter. In contrast, compact radio galaxies emit radio lobes not much larger than the galactic nucleus.

Featured Images

Jetting Across the Universe Tuesday, August 12, 2014
Combined X-ray, optical, and radio view of the galaxy Centaurus A
Busy Galaxy Sunday, April 29, 2012
M87 black hole
Busy Black Hole Wednesday, August 11, 2010

Radio Programs

Quasars IV An astronomical navigation system Friday, February 8, 2013
Centaurus A A galaxy with a loud voice Sunday, April 29, 2012

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