If it were possible to shine a flashlight from the outer edge of our galaxy, how long would it take for that beam of light to travel through the galactic web of stars, through the center, and out to the opposite side?
Our galaxy has a diameter of 105700 light years. So, it will take 105700 years for that beam of light to travel through the galactic web of stars, through the center, and out to the opposite side.
