Question: what is the interesting thing about the space that people don't really know about?

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  1. One of the most interesting things about space to me that probably few people know about is that it’s not really empty. There are lots of different gases, mainly hydrogen, but also helium and oxygen out there between the stars, and even between galaxies. There’s also what astronomers call “dust”, which is not like dust on benchtops, but more like grains of minerals made up of silicon, magnesium or iron. My favourite dust is olivine: it’s a green mineral made up of all three elements listed; it’s found on Earth and in very “dusty” places where stars form.