If you ask anyone sith an average knowledge to describe us the space, probably it mentions 3 features: It's dark, colk and empty. Indeed, the first two properties are consequences of the third one. Although there is a lot of light ciuculating through space, the almost complete absence fo gas molecules in its path results a black background. And because heat is molecules in vibration, the perceived temperature is in practice, an intense cold.

Another consequence of the empty is that the space is quiet as well. The reason for the quiet space is because the waves need a means to spread. In the space there is no molecules and therefore any possible sound dies without being able to be transmitted to nowhere.