Astrochicken

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Astrochicken is a thought experiment by Freeman Dyson. It imagines a tiny, one-kilogram spacecraft that could explore space on its own by combining biology, artificial intelligence, and modern electronics. Building on ideas from John von Neumann about self-reproducing machines, Dyson asks if a small automaton could explore space more cheaply and effectively than a crewed ship.

In Dyson's plan, Astrochicken would be launched by a regular spacecraft and would hatch in space, growing a solar energy collector to power a small propulsion system called an ion drive. As it comes near a planet, it would gather material from moons and rings to use as nutrients and building blocks. It could land and take off again with a small chemical rocket, and it would periodically send back data to Earth when radio contact was possible.

The name "astrochicken" came from a remark during a lecture in Adelaide, when someone joked that the idea was “an astro-chicken,” and the name stuck. Today the idea has influenced thinking about space exploration, with advocates for many tiny, cheap robots exploring planets, and NASA aiming for smaller, cheaper missions. Michio Kaku has praised Astrochicken as a lightweight, intelligent probe that could even "eat" ice and hydrocarbons found in outer rings. Dyson’s other ideas, such as the Dyson sphere and Dyson tree, have become famous in science and science fiction, but Astrochicken is less widely known.