Very interesting video that shows how tiny we are in our universe. Shows the sizes of some planets and stars in order. And as an example, the diameter of the red giant is 28 * 10 ^ 8 km. Is it hard to imagine this size? Well, using an example, if you fly an airplane at a speed of 900 km / h, then you would have to fly 1100 years to fly around this star in a circle.