/sci/ - Science & Math

>>9752646
Is this better?
"A gyroscope's spin vector (arrow) points at right angles to the plane of its motion, and its direction remains constant as the gyroscope completes a circular orbit. If, however, we fold space into a cone to simulate the effect of the presence of the massive earth (right), then we must remove part of the area of the circle (shaded) and the gyroscope's spin vector no longer lines up with itself after making a complete circuit (green and red arrows). The difference between these two directions (per orbit) makes up the other two thirds of the geodetic effect. In the case of Gravity Probe B this is sometimes referred to as the "missing inch" argument because space curvature shortens the circumference of the spacecraft's orbital path around the earth by 1.1 inches."
https://einstein.stanford.edu/SPACETIME/spacetime4.html