I've always wondered just how inertial (i.e. non-accelerating) various reference frames are. Yesterday I finally sat down and did the math. Some of the relative magnitudes surprised me.
Here we go -- comparing accelerations (rough values):
Feb 7, 2019 · 3:37 PM UTC
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9.81 m/s^2: acceleration of object in freefall at Earth's surface
8.68 m/s^2: accel of @Space_Station center of mass
1.63 m/s^2: accel of object in freefall at Moon's surface
0.034 m/s^2: centripetal accel at equator (makes you slightly lighter) due to Earth's rotation
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0.0059 m/s^2: acceleration of Earth's center of mass due to Sun's gravity
0.0023 m/s^2: Coriolis acceleration due to ISS pitch rate of an astronaut translating at 1 m/s through @Space_Station
3.3e-05 m/s^2: acceleration of Earth's center of mass due to Moon's gravity
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