People often illustrate space-time curvature with an heavy ball curving a sheet but the heavy ball is curving the sheet because that heavy ball is pulled by Earth’s gravity but in space there is no gravity without space time bending,so while there is no gravity how is the space-time bent wherever there is mass?
In: Physics
Gravity itself is inherently and proportionally related to mass, not a separate force from it. It’s only effective when an object has a big enough mass to actually affect exert force over a wide radius.
Anyway, if an object is moving at any sort of significant ratio of the speed of light, the energy of the system is increased…. and since mass and energy directly proportional, the mass of the object actually increases as well. I know there’s more to explain, but it’s been awhile since I’ve thought about, let alone studied, relativity and astrophysics.
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