Lenticular clouds may look like they’re from outer space. But they’re actually the result of normal scientific processes that happen right here on Earth! They are stationary clouds that form at high altitudes. They’re usually aligned at a right angle (perpendicular) to the direction of the wind. This type of cloud often forms near mountain ranges. When stable humid air blows over the top of a mountain, it can form a group of big waves on the range’s downwind side. If the temperature is low enough on this side, the moisture in the air will condense. This forms the uniquely-shaped clouds we know as lenticular clouds. In the right conditions, these can form what scientists call a “wave cloud.” Lenticular clouds are also unique in that sometimes you may see bright colors what scientists call irisation, along their edges. This helps give them an outer space look! Airplane pilots try to avoid flying near lenticular clouds. The waves of air that form the clouds can cause turbulence. That can make riding in an airplane near lenticular clouds a bouncy, scary experience.