Weighing the invisible: how light reveals the secrets of black holes ⚡ экспресс
Original: "Black hole mass and distance from accretion disk astrophysical observables"
Light from superheated matter around a black hole shifts color, giving away its mass and distance.
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Light from matter circling a black hole changes color: on one side it redshifts, on the other it blueshifts. This happens because of the motion's speed and gravity's pull. New formulas use these color shifts to calculate the hole's mass and distance — just like weighing an invisible phantom.
🎯 The color of light emitted near a black hole can shift so dramatically that ultraviolet radiation turns into infrared — purely due to gravity, without any motion involved.
🎬 In Interstellar, the bending of light around a black hole is shown — the very effect that new formulas use for 'weighing.'