Space is, by an extreme margin, mostly empty. Even our solar system is mostly empty, with light years of empty space to the next one system. Dust clouds we see in space can often be light years across, and still look like nothing when you’re inside it.
Depictions of space in media and diagrams do not do justice to the scale everything is, how completely massive they are, and how tiny they are yet in comparison to the space in between them.
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