Way out in space, maths plays a COSMIC role. It’s a world of spheres and symmetry, and the way the Moon looks from Earth is all down to angles. A total solar eclipse is due to an extraordinary numerical coincidence: the Sun is about 400 times larger than the Moon, but 400 times farther away... Find out why comets shrink, galaxies form spirals, and if there’s a mathematical answer to alien life out there...