Clouds of Mars

[Image: The clouds of Mars, courtesy of NASA/Mars Pathfinder].

Lest you be worried about the "possible existence of nighttime clouds" on Mars, it may cheer you to know that these clouds have not only been discovered, they are also "far more extensive than their wispy daytime counterparts, and about five times as thick. They lie relatively low in the atmosphere, almost like fog, and form belts around the equator during summertime in the northern hemisphere."