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There are several possibilities. The largest NASA rockets used liquid hydrogen (with liquid oxygen as the oxidizer).

Hydrazine is one of the more powerful fuels, but it is dangerous and difficult to handle. Some rockets use a version of kerosene, the same chemical used as jet fuel.
Liquid hydrogen. Because it has such i low boiling point, it must be super cooled to liquid form.

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Waldo Ledner

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2y ago

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