| ▲ | vova_hn2 an hour ago | |
> thanks to them we have satellites in the first place? What kind of astronomy knowledge is required to launch a satellite? | ||
| ▲ | ShinyLeftPad an hour ago | parent [-] | |
idk if I want to list all if it cause it will be very long but let's start with knowing that earth rotates on its axis;) | ||