Centuries: 5th century - 6th century - 7th century
Decades: 490s - 500s - 510s - 520s - 530s - 540s - 550s - 560s - 570s - 580s - 590s
Years: 552 553 554 555 556 557 558 559 560 561 562
... telescopic star catalogues, Bessel's and Newcomb's[?] measurements of precession and finally the precession of perihelion in Einstein's General Theory of ...
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