Mass and Acceleration
Earth is gaining mass daily from meteor dust, significantly outweighing any loss from space probes or evaporating gases. Acceleration, rather than speed, is the critical factor that affects passenger safety in high-speed travel, emphasizing that it's the forces experienced during acceleration that can be dangerous. Enjoying high speeds is possible, as long as one navigates the physics involved wisely.In this clip
From this podcast

StarTalk Radio
StarTalk Podcast: Cosmic Queries: Galactic Grab Bag, with Neil deGrasse Tyson and Iliza Shlesinger
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