to the other at the speed of light? Answer: an infinite amount of time!
https://www.forbes.com/sites/quora/2018/08/06/how-long-would-it-take-to-travel-from-one-end-of-the-universe-to-the-other-at-light-speed/#4402724834bc https://www.forbes.com/sites/quora/2018/08/06/how-long-would-it-take-to-travel-from-one-end-of-the-universe-to-the-other-at-light-speed/#4402724834bc