Robert Lea is a science journalist in the U.K. whose articles have been published in Physics World, New Scientist, Astronomy Magazine, All About Space, Newsweek and ZME Science. He also writes about science communication for Elsevier and the European Journal of Physics. Rob holds a bachelor of science degree in physics and astronomy from the U.K.
A radio galaxy is a type of galaxy with giant regions of radio emissions that reach far beyond its visible structure. The core of Centaurus A imaged here, is the smallest known extragalactic radio source, only 10 light-days across.A radio galaxy is a galaxy that dominates the sky over Earth in radiowaves. These intense radio emissions originate from vast lobes of gas that extend well beyond the galaxy's visible structure, often spanning millions of light-years..
The radio wave emissions of radio lobes can be so powerful they can give off as much energy per second as ten times the total energy emitted by the entire Milky Way galaxy, Why do astrophysicists like yourself think giant radio galaxies might be the product of galaxy mergers?
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