The name of the largest known galaxy is IC 1101 .
It has a radius of 1.9569 million light-years, which dwarfs the radius of our Milky Way galaxy, which is only 52,850 light-years. And it is approximately 12.31 billion years old.
This enormous elliptical galaxy is 320 megaparsecs (1.05 billion light-years) from Earth. It is also incredibly massive (no wonder), as it has a mass equivalent to about 100 trillion stars.
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