... Just as rainbows are lit by the Sun, moonbows are lit by the Moon. Since the Sun is so much brighter than the Moon, sunlit rainbows are much brighter and more commonly seen than moonbows. Pictured above is a moonbow stretching over Salt Pond Bay in St. Unusual Flashes Toward Globular Cluster M22 . ... This teaming ball of stars is the brightest globular cluster visible in Earth's northern hemisphere. ... Hydrogen, Helium, and the Stars of M10 . ... All of Mars . ... A Brighter Comet LINEAR . ...