Robert Goddard contributed to astronomy by A-walking on the moon B-designing liquid propulsion system C-developing theories of gravity and motion D-using math to predict the existence of Neptune

Robert Goddard contributed to astronomy by

A-walking on the moon

B-designing liquid propulsion system

C-developing theories of gravity and motion

D-using math to predict the existence of Neptune

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Robert Goddard contributed to astronomy by A-walking on the moon B-designing liquid propulsion system C-developing theories of gravity and motion D-using math to predict the exi…

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