system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5 how can we only see objects a few kilometers in the horizon, but at the same time, see space objects hundreds of kilometers in the sky?

I got this thinking while on a car trip. I know the medium distance into the horizon are only a few kilometers (say between 10-20 kms), so how can when I look up, I can clearly see stars, the sun, the moon, airplanes and possibly even spaceships which are way more distant than the horizon limit?
gpt
The horizon is because of the curvature of the Earth, not a limit of vision. You can't see past the horizon because the Earth is between you and whatever you want to look at.

Distant stars have nothing in the way so as long as they're bright enough you can see them with the naked eye.