Here’s a kid-friendly guide to traveling just as fast as one can travel, from NASA’s Goddard Space Flight Center.
So, you’ve just put the finishing touches on upgrades to your spaceship, and now it can fly at almost the speed of light. We’re not quite sure how you pulled it off, but congratulations! Before you fly off on your next vacation, however, watch this handy video to learn more about near-light-speed safety considerations, travel times, and distances between some popular destinations around the universe.
Source: https://blog.adafruit.com/2021/10/23/nasas-guide-to-near-light-speed-travel-spacesaturday/