Today is the autumnal equinox and a Super Harvest Moon will cross the sky after almost 20 years since the last time it happened. When the Sun starts to set on the Western horizon, a full moon will rise opposite to it on the East, reflecting the light of our home star. Being close to the horizon, the orange Moon will be gigantic thanks to a psychological effect called the Moon illusion. The sky will be illuminated by the Sun and the Moon at the same time, creating a weird 360-degree effect that is rarely seen.