A Galactic Year is the time it takes our solar system to orbit the Milky Way. It takes ~230 million years to finish one and we actually undulate up and down along the way: gravity pulls us toward the dense disk, but our momentum makes us overshoot, so we get pulled down again pic.twitter.com/w6z1Lsl5hL
— Dr James O'Donoghue (@physicsJ) June 27, 2020
via Twitter https://twitter.com/physicsJ
June 27, 2020 at 06:21PM
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