卫星如何检验爱因斯坦的微小预测
In general relativity, gravity is not simply a force pulling across empty space. Mass bends spacetime, and a rotating object can also twist the surrounding geometry slightly.
Earth creates only a tiny version of this frame-dragging effect. Scientists track special satellites with laser pulses and study small changes in their orbits that cannot be explained by ordinary gravity alone.
Inspired by a public Scientific American title/summary · Rewritten by Vocabsavvy · Vocabsavvy Original (public-snippet inspired)