The fabric of space is a concept to describe the field in which light travels in a given distance and time from one reference plane. Since the speed of light must be the same for all planes of reference, the fabric of space must distort in order to keep the speed of light at a constant value.
From an observer floating in space looking miles from a large mass that can bend light in their reference frame, the fabric of space that they witness will need bend to insure that light traveling around the radius of the bend does not allow the light to accelerate past the speed of light nor increase in velocity. An observer on the large mass will observe another different phenomenon of the same light with their plane of reference making another fabric of space to keep the speed of light the same value for both observers.
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