Radio galaxy

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A topic known well beyond its field, found in many languages.

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What Wikipedia says

A radio galaxy is a galaxy with giant regions of radio emission extending well beyond its visible structure. These energetic radio lobes are powered by jets from its active galactic nucleus. They have luminosities up to 1039 W at radio wavelengths between 10 MHz and 100 GHz.

Excerpt from the Wikipedia article “Radio galaxy”, under the CC BY-SA 4.0 license. Read the article on Wikipedia

Image: Martin Hardcastle, CC BY-SA 3.0, via Wikimedia Commons.