Gravity bends light emitted from the back a massive sphere toward a viewer in front. For example, someone observing a neutron star from far away would see more than half its surface.
What formulae define this azimuthal map projection? (It is no longer an orthographic or near-side perspective projection.) What would the earth look like if all but one point were projected this way onto a disc? (Physically, such a scenario corresponds to the Earth's surface being a thin shell magically hovering just above the event horizon of a 2157.284 solar mass intermediate-mass black hole.)
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