1. The problem statement, all variables and given/known data The Galaxy has a black hole with about 3 x 10^6 M☉. What is its diameter in AU? 2. Relevant equations Not sure. 3. The attempt at a solution 3,000,000 solar mass, but not sure how to figure out the diameter in AU. Let's see...diameter of the sun is 1,000,000km 3,000,000 x 1,000,000 = 3 x 10^12 km......one AU is 150 million km....1.5 x 10^8 3x10^12km/1.5x10^8 = 2x10^4 AU???????