“Not being an astronomer, I don’t know if 50,000 light-years is big or small.”
It’s big. Light travels at 186,000 miles per second, so a light year is the distance light can travel in one year, or approximately 5.8 trillion miles...5,800,000,000,000...
Right about c. I was wondering big or small in relation to Milky Way. The Mopilky Way diameter ought to be anarbitrary unitary measure like AU so we know the size quickly.