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I tried to figure out the shape of geodesics around a heavy round body far away from any other matter (say the earth with some approximation). Since I keep the famous apple in my hand and then let it free it will follow a straight line towards the center of the planet. Does it mean that the apple is following a geodesic? Has anybody found a simple way of explaining how to figure out space curvature to the layman?For example, the idea of explaining Minkowski space letting one space dimension out, and using the wellknown double cone picture is fantastic. Nothing similar can be envisaged for space curvature?Thank you,Paolo de Magistris, Rome.