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31 Dez 1928 Jahr - Hubble and Humason identify Hubble's Law, proving that the Universe is expanding
Zugefügt zum Band der Zeit:
Henrietta Leavitt
By
Shawn Cunning
2 Okt 2018
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494
Datum:
31 Dez 1928 Jahr
Jetzt
~ 96 years ago
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