system
Given the following post, respond as if you're commenting on Reddit:
human
Does the vacuum of space have a temperature?
gpt
The thing is, space isn't really a vacuum. It's a *very very* thin gas. So if you look at a big enough volume, you have enough gas particles to define a temperature. The overall picture is in the galactic disc we have "cold" molecular clouds that are <1000 K, in a "warm" ionised medium that's about 10,000 K, and that's inside a "halo" of really hot ~1,000,000 K gas.

However, if you float an object (like a guy in a space-suit) in this 1,000,000 K gas, they won't feel like it's 1,000,000 K because the gas is so thin that its atoms only rarely bump into the object, and so it really feels like a vacuum. The temperature of the object will really depend on radiation - how much light it's absorbing from nearby stars, and how much light it's emitting itself.