This Is the Biggest Galaxy Ever Discovered, and It's Still Growing

Aug 28, 2026
The galaxy most commonly called "the biggest galaxy in the universe" is actually based on an exaggerated myth, and the real answer is even stranger. This video breaks down IC 1101's true measured size, then explores the actual record holders, Alcyoneus, Porphyrion, and TXS 0033+252, giant radio galaxies whose black hole jets stretch over 20 million light-years, and why that record has already changed three times in just the last few years.
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Cosmic Signal
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