Post #4363638

Astronomers have made the first measurement of the full size of the largest known galaxy, obtained with the Isaac Newton Telescope in the Canary Islands. IC 1101 is roughly 1.7 million light-years across, with mass equal to roughly 3.4 trillion suns. For comparison, our galaxy is around 110,000 light-years across, so this galaxy is 15 Milky Ways wide. By volume, almost 4,000 Milky Ways would fit in IC1101. This massive galaxy hasn't finished growing yet.