In 1925, Edwin Hubble's observation of Cepheid variables in the Andromeda galaxy revolutionized astronomy, proving the existence of galaxies beyond the Milky Way. This discovery, aided by telescopes ...
Why did they form at that time? Astronomers know from observing distant exploding stars that the size of the universe has ...
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Radio Antennae Could Soon Use Early Signals From Cosmic Dawn To Explain How The Universe Was Formed
Somewhere between 50 to 1 billion years after the Big Bang, our universe experienced something known as Cosmic Dawn. This was the time period in which the very first stars, black holes, and galaxies ...
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