Super Duper Moon
On August 10 we will have the second of three super moons this year. This perigee moon will appear larger than than the other two because it becomes full during the same hour as perigee.
According to Geoff Chester of the US Naval Observatory, “The ‘Moon Illusion’ is probably what will make people remember this coming set of Full Moons, more than the actual view of the Moon itself,” he says.
The illusion occurs when the Moon is near the horizon. For reasons not fully understood by astronomers or psychologists, low-hanging Moons look unnaturally large when they beam through trees, buildings and other foreground objects. When the Moon illusion amplifies a perigee Moon, the swollen orb rising in the east at sunset can seem super indeed.
“I guarantee that some folks will think it’s the biggest Moon they’ve ever seen if they catch it rising over a distant horizon, because the media will have told them to pay attention to this particular one,” says Chester.
Enjoy Dennis DeYoung of Styx fame – Grand Illusion: