geordief Posted October 15, 2017 Share Posted October 15, 2017 (edited) https://www.google.ie/imgres?imgurl=https%3A%2F%2Fi.stack.imgur.com%2FiGT6a.jpg&imgrefurl=https%3A%2F%2Fphysics.stackexchange.com%2Fquestions%2F3009%2Fhow-exactly-does-curved-space-time-describe-the-force-of-gravity&docid=FNB641e0gGK45M&tbnid=PbJ8EF-vi9eU2M%3A&vet=10ahUKEwjXuuC9t_LWAhVSaFAKHfP5CksQMwg2KBAwEA..i&w=600&h=458&hl=en&bih=769&biw=1600&q=earth curved space&ved=0ahUKEwjXuuC9t_LWAhVSaFAKHfP5CksQMwg2KBAwEA&iact=mrc&uact=8 These grid lines are shown as curved around the massive object that is the Earth. I appreciate that they are an attempt to show 4D and so this picture is non representative (very incomplete) on that account but I want to ask specifically what observer could have drawn those lines? Someone far removed from Earth's gravity? That is how such an observer would draw a "straight line" in the vicinity of the Earth? An observer on the Earth would draw different "straight lines"? Correct? Edited October 15, 2017 by geordief Link to comment Share on other sites More sharing options...
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