30/08/2021
This photo may not seem impressive, until you realize what the blue is.
TON 618 is a quasar, located just over 10 billion light years away. Powering the quasar is an absolute monster of a black hole.
TON 618 is as bright as 140 trillion suns and has a mass of about 66 billion suns. For comparison, all the stars in our galaxy combined share a mass of only 64 billion suns. That is, TON 618 is over 15,000 times more massive than Sagittarius A*.
With a mass of 66 billion M☉, TON 618 has a Schwarzschild radius (the radius of a black hole based on its mass) of 1,949 × 10¹⁴ meters. That's a black hole with a diameter of 389.8 billion kilometers, or 242.2 billion miles.
The black hole far surpasses the requirements of a super massive black hole, so new categories are being created to label it. As of now, it is by far the largest known black hole. The truly amazing thing is it could theoretically be even bigger than that. Due to it being over 10 billion light years away, we're seeing it as it was 10 billion years ago.