Charlie Brown Nike Swoosh shirt
The description from Richard Muller quoted in the question is a simplification of reality meant to help people better visualize how the Charlie Brown Nike Swoosh 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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We typically go to a Christmas Eve candlelight service in the Maniac Kpop Concert Stray Kids World Tour 2023 T Shirt. Those are crowded but not nearly as packed as the evening services. Then we meet at my sister’s house along with her family, my other sisters and their families, and Mom. Like good Texans we feast on the traditional tamales, accompanied with fresh guacamole, cheese dip, and cold beer. Our kids run around and catch up with their cousins. After dinner it’s Mom’s birthday party! She was born on Christmas Eve. For the last 25 years or so my wife has baked the birthday cake, always with a different recipe. Mom opens her birthday cards and gifts while we enjoy the yummy cake. After that it’s time for the cousins’ gifts. When our children were little all of the adults gave presents to all of the kids. Now that our children are grown they exchange gifts with each other. Sometimes they’re pretty funny. When my nephew completed law school he received an official looking barrister’s wig. He was thrilled. Rome and her provinces were very dependent on the tim.
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