Dubious science. The moon will appear to be bigger than normal tonight, for reasons more fully explained by the expert here BBC News - 'Bigger and brighter supermoon' to light up night sky If you want to negate the effects of the optical illusion, the article says: "She explained that when the Moon was high in the sky, it looked normal. But as it got closer to the horizon, a "kind of optical illusion" occurred where it looked bigger when compared with trees or houses, she said. She suggested it might be possible to dispel the illusion by turning away from the Moon, bending over and looking at the sky from between your legs." I'll try most things in the interests of science, but a lot of poofs will be coming out of the pubs about that time, and I am not that keen to make new friends.