I have Astronomy Picture of the Day as my Chrome home screen. The phases of the moon was yesterday's APOD. Always fascinating.
https://apod.nasa.gov/apod/astropix.html
This one is a really weirdly produced one with an almost robot voice and fuzzy movie, but it describes what you would see if you approached the speed of light - if the speed of light was 1 meter per second. It shows how totally wrong sci-fi movie makers are - nature is a very strange place.
https://apod.nasa.gov/apod/ap111018.html