what are the light areas on the moon called
Moon The lighter-coloured regions of the Moon are called terrae, or more commonly highlands, because they are higher than most maria. They have been radiometrically dated to having formed 4.4Â billion years ago, and may represent plagioclase cumulates of the lunar magma ocean.[61][62] In contrast to Earth, no major lunar mountains are believed to have formed as a result of tectonic events.[72]
Halo (optical phenomenon) Halo (from Greek ἅλως, halōs[1]) is the name for a family of optical phenomena produced by light interacting with ice crystals suspended in the atmosphere. Halos can have many forms, ranging from colored or white rings to arcs and spots in the sky. Many of these are near the Sun or Moon, but others occur elsewhere or even in the opposite part of the sky. Among the best known halo types are the circular halo (properly called the 22° halo), light pillars and sun dogs, but there are many more; some of them fairly common, others (extremely) rare.