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The description from Richard Muller quoted in the question is a simplification of reality meant to help people better visualize how the Original Lsu Tiger Welcome To The Series 2023 Pocket Baseball Shirt of spacetime works. In reality the galaxies are moving through spacetime in a complex fashion, based on the combination of all the forces acting on them, primarily the gravity of nearby galaxies and galaxy clusters. In the case of the Milky Way and Andromeda, these two galaxies are part of a gravitationally bound cluster of galaxies, called the Local Group. The dominant force that determines the movements of objects within the cluster is the combined gravitation of all the mass in the cluster, and not the expansion of spacetime. In other words, the gravitational attraction that the Milky Way and Andromeda have for one another that is drawing them together is stronger than the expansion of spacetime between them that would otherwise push them apart, and thus attraction wins and the two galaxies are on a collision course. In the same vein, the gravitational force that holds the earth in orbit around the sun is stronger than the expansion of spacetime between the earth and the sun (the expansion of spacetime at that distance being very small), and so the earth’s distance from the sun is not increasing for that reason. Likewise you are not flying apart because the molecular bonds holding the atoms in your body together are stronger than the minuscule expansion of spacetime between them in your body. The Local Group as a whole, however, is moving away from other galaxies and galaxy clusters to which it is not gravitationally bound, due to the expansion of spacetime.
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In the 70s, my then-boyfriend and I took a camping trip to the Wharton State Forest – the Pine Barrens of New Jersey. We would see truckloads of odd-looking people drive into the Official Logo Nll Shop Buffalo Bandits Women’S 2023 Nll Cup Champions Shirt (not on paved roads – sand and dirt) and never come out that we could see. We figured there must be roads leading out of the campground, maybe shortcuts, so late one afternoon decided to see where one of these went. We had my mother’s Oldsmobile, a rather heavy car, and went for what seemed like miles, never finding anything, except smaller, more narrow paths off the main road. It was getting late, so we turned around to go back and got stuck…the car dug into the soft, sandy road and we couldn’t get out. John decided he would walk back to the campsite and contact a ranger, leaving me with the car.
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