Astronomers have precisely measured the size of the largest known galaxy
SMRTR summary
Astronomers have precisely measured IC 1101, the largest known galaxy, finding it spans 1.7 million light-years and contains 3.4 trillion solar masses, making it 17 times larger than the Milky Way. Located about 1 billion light-years away, the measurement was challenging due to light contamination from foreground stars. IC 1101 is still growing, continuing to absorb surrounding matter and smaller galaxies.
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