An aerobot is an aerial robot, usually used in the context of an unmanned space probe or unmanned aerial vehicle. While work has been done since the 1960s on robot "rovers" to explore the Moon and other worlds in the Solar system, such machines have limitations. They tend to be expensive and have limited range, and due to the communications time lags over interplanetary distances, they have to be smart enough to navigate without disabling themselves. For planets with atmospheres of any substance, however, there is an alternative: an autonomous flying robot, or "aerobot" Most aerobot concepts are based on aerostats, primarily balloons, but occasionally airships. Flying above obstructions in the winds, a balloon could explore large regions of a planet in great detail for relatively low cost. Airplanes for planetary exploration have also been proposed.

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