system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: How do we get perfectly lighted pictures of a planet that's so far away from the sun?
gpt
Anyone who is answering "there's plenty of light" is full of shit. Pluto is very dark and it's not easy at all to take photos of Pluto that look that good.

Have you ever tried taking a picture with a film camera where you can manually set the exposure time?

On a bright day, you can open the shutter for 1/60 of a second (or less) and get a nice clear picture. Indoors, you need to open the shutter for longer, because there's less light.

Pluto is really dark, so the New Horizon spacecraft has to open its camera shutter for a long time in order to get such a bright, clear picture.

In fact, it needs to open it so long that the planet moves in that time, so it has to *rotate* the spacecraft to keep the planet centered!

Not easy.