3 ms·
From another comment, there's this PBS Space Time video on Youtube. https://www.youtube.com/watch?v=O4Ko7NW2yQo https://www.youtube.com/watch?v=O4Ko7NW2yQo
by Jeff_Brown 6y ago
From another comment, there's this PBS Space Time video on Youtube.
https://www.youtube.com/watch?v=O4Ko7NW2yQo https://www.youtube.com/watch?v=O4Ko7NW2yQo