If tonight’s full moon looks bigger and brighter than normal, that’s because it is, Space.com reports. The satellite reaches its perigree today, making its position the closest of the year to Earth—though still some 222,000 miles away. The moon's irregular orbit causes the distance to vary.
As a result, NASA says, the full moon will appear 14% bigger and 30% brighter than others this year. Because of the moon’s gravitational relationship with the sun, its proximity will pull tides higher tonight, too.