DARK MATTER AND DARK ENERGY Planets, stars, asteroids, galaxies – the things that we can actually see – constitute less than 5% of the total universe. So what makes up the rest? There in lies the mystery. Dark matter is the name we give to all the mass in the universe that remains invisible, and there’s a whole lot of it. That mysterious substance known as dark matter. We can’t see it, we don’t understand it, but we know it’s out there. And we also give the name Dark matter for all the mass in the universe that we can’t detect. So how do we know dark matter exists if we can’t detect it? Well, the short answer is that whilst we can’t see dark matter, we can see its effects. So, How do we know dark matter is real? We will try understand it, with its effects. 1. Dark matter is EVERYWHERE Planets, stars, asteroids, galaxies – the things that we can actually see – constitute less than 5% of the total universe. So what makes up the...