I also got the space bug from reading sci-fi. Robert L. Forward's "Dragon's Egg" did for me.... and it was apparently one of A.C.Clarke's favourite books too.
On Earth we've got it easy - a gravity of 1.0 and only 17,000 mph required to get out of here. The book is about a civilisations' life on a neutron star where the surface gravity is 67,000,000,000 (sixty seven billion) times that of Earth's - and they still manage to make contact with humans. A truly wonderful work that is steeped in real physics.
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