These are the sizes of the Black Hole at the center of the Milky Way, Sagittarius A, and one of the largest Black Holes ever discovered, Ton 618. Since Ton 618 is so massive, it would take several weeks just for light to travel the diameter of the Black Hole, and it takes light going as fast as it can going from sun to the earth 8 minutes and 20 seconds. Ton 618 is on a course to collide with the Milky Way, but it will not collide with us for another 10 billion years. You can also fit 26,000,000,000,000,000,000,000 Earths into Ton 618, Visit Quora to see the exact calculation on how this number came to be! There is also a term called "Spaghettification", which is a term that illustrates that if you ever come too close to a Black hole, everything near it will stretch into a line and become like a spaghetti noodle.
| Black Hole | Diameter (Solar Radii) | Mass (Solar Masses) |
|---|---|---|
| Sagittarius A* (Milky Way) | ~24 million km | ~4.3 million |
| TON 618 | ~1.9 billion km | 66 billion |