Minimum required technology for a species to reach space?

Ok so first of all, let's imagine a civilisation on a planet. The planet has a relatively low escape velocity, say 6 km/s and maybe an atmosphere 30% - 50% the thickness of earth's atmosphere. Now imagine the species wants to send something (a probe, an object) into space (can be very small, say down to 1kg of mass), what minimum amount of knowledge/technology would this civilisation need to have in order to achieve this goal?

I would imagine, that they would at least need the very basics in the laws of gravity. That would make them a pretty advanced civilisation already. But given perfect circumstances (and maybe a little bit of luck) how primitive could you go, before it becomes too impossible?

EDIT: They would also want the object to stay in space. So reaching an altitude considered "space" and then entering the atmosphere again wouldn't complete the objective.

posted over 6 years ago

filedescriptor‭

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