The Earth-Moon Barycenter: The Moon doesn't orbit Earth's center and Earth doesn't stay still (3D!)

Earth moves up to 5000 km away from the common center of mass (barycenter) between Earth and Moon, this is due to the Moon&gravitational influence! So here *both* Earth & Moon orbit their common center of mass (and do stick around to see the speed-up on Aug 12...). Made with actual predictive data from NASA Follow for early releases and Q&A @physicsJ Twitter