From the Editor's Desk It’s been almost 100 years since humanity first reached a revolutionary conclusion about the nature of our Universe: space itself cannot and does not remain static, but rather evolves with the passage of time. One of the most unsettling predictions of Einstein’s general relativity is that any Universe — so long as it’s uniformly (or almost uniformly) filled with one or more species of matter, radiation, or energy — cannot remain the same over time. Instead, it must either expand or contract, something initially derived independently by three separate people: Alexander Friedmann (1922), Georges Lemaitre (1927), and Howard Robertson (1929), and was later generalized by Arthur Walker (1936). |
Monday 20th May 2024
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