* The Milky Way is not a perfect disc: It's a spiral galaxy with a central bulge and arms extending outwards. The distance across the galactic disk varies depending on where you measure.
* The galaxy is constantly moving: Stars and gas within the galaxy are in motion, meaning the distance between two points can change over time.
However, we can estimate:
* Diameter of the Milky Way: Roughly 100,000 light-years.
* Light speed: 299,792,458 meters per second (approximately 300,000 km/s).
Using these estimates:
* It would take light approximately 100,000 years to travel across the Milky Way.
Important Note: This is a very rough estimate. The actual time could be longer or shorter depending on the specific path taken and the movements of the stars and gas within the galaxy.