IC 1101: Largest Galaxy in our known Universe

IC 1101 is the largest known galaxy which is situated at the Abell 2029 galaxy cluster. It is a giant elliptical galaxy or otherwise known as the "Supergiant Ellipticals".

It is about 1.07 billion light years away in the constellation of Serpens. It is approximately 5.5 million light years in diameter, making it the largest galaxy in terms of breadth (as of 2010).

It is about 50 times the size and 2000 times massive than our Milky Way Galaxy. It has about 100 trillion stars compared to roughly 100-200 billion stars in our galaxy.