While most of the lunar exosphere comes from the solar wind, NMS showed that some gas comes from lunar rocks. (sciencedaily.com)
Most of the moon's exosphere comes from the solar wind, a thin stream of electrically conducting gas blown from the surface of the sun into space at around a million miles per hour. (sciencedaily.com)
«The variation of Mercury's calcium exosphere with the planet's position in its orbit has been known for several years from MESSENGER observations, but the proposal that the source of this variation is a meteor shower associated with a specific comet is novel,» added MESSENGER Principal Investigator Sean Solomon, of the Lamont - Doherty Earth Observatory at Columbia University in New York. (sciencedaily.com)