The chapter delves into the exploration of the universe's expansion, starting from Henrietta Leavitt's groundbreaking work to the discovery of galaxies and the universe's accelerated expansion. It discusses the mysterious nature of dark energy and its potential implications for the universe's future, including concepts like the 'big rip' and heat death.
In the early 1900s, Henrietta Leavitt made one of the most important discoveries in the history of astronomy: a yardstick to measure distances to faraway stars. Using this tool, scientists eventually transformed our understanding of the universe. They realized space was expanding, that this expansion was accelerating, and that ultimately, everything will end.
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