Titlebook: Cosmology for the Curious; Delia Perlov,Alex Vilenkin Book 2024Latest edition The Editor(s) (if applicable) and The Author(s), under exclu

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https://doi.org/10.1007/978-3-030-85574-1s are grouped in clusters, which are in turn grouped into still larger structures, called superclusters. The formation of cosmic structures is an active area of research, and we now believe we have a good idea of how they emerged.

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Valeria Minghetti,Federica Montagutibang, the fireball gets hotter and denser, and other types of particles emerge. They move at nearly the speed of light, colliding frequently and violently. As we shall see, some of the most dramatic events in the history of the universe occurred within a small fraction of a second after the big bang

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Hubble’s Law and the Expanding Universeeriously had spectral lines that were red-shifted, indicating that they were moving away from the Earth, some at speeds of up to 1000?km/s. Motion at high speed is not uncommon in the cosmos—the Sun, for example, orbits around the center of our Galaxy at 240 km/s.

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