The Moons Of Mars

most interesting of all moons aiO the two that attend Mars, each about sixty milus iii diameter. That planot is just one-half the size of the earth; its surface is divided into continents and seas, having as mueh land as water; it has an atmosphere, clouds iivquentl.y its i'aco, and its seasons are about the same as here, though the winters aro ooider. Because one of the moons iravels around it three times as fast as Jlars itself turns. it appears to rise in the west and set in the east, whüe the other, really circling1 in the same direction at a speed comparatively slow. rises in the easo uiul sets in the west. Thus both 11 in tlie heavens at the same time, golag opposite ways.