"astronomer" in inglés with examples - Collocation dictionary inglés
- But astronomers have since invented adaptive optics, a technique that measures the atmospheric turbulence above a telescope and continuously deforms its mirror to compensate.
- For more than two centuries after Sir Isaac Newton invented the reflecting telescope - the type of telescope still used by most observatories - astronomers observed with their eyes.
- The Eastern Han Dynasty scholar and astronomer Zhang Heng (78-139 AD) invented the first water-powered rotating armillary sphere (the first armillary sphere having been invented by the Greek Eratosthenes), and catalogued 2500 stars and over 100 constellations.
- In the 14th century, the Syrian astronomer and timekeeper Ibn al-Shatir (1304-1375) invented a timekeeping device incorporating both a universal sundial and a magnetic compass.
- Muslim astronomers also independently invented the celestial globe, which were used primarily for solving problems in celestial astronomy.
- When the southernmost stars also were divided up, the whole situation became somewhat chaotic; various astronomers invented their own constellations, some of which were so small and so obscure as to be unworthy of separate identity.
- Jean-Paul Fouchy, a mathematics professor and astronomer in France invented an octant in 1732.
- A Belgian statistician and astronomer, Adolphe Quetelet, invented the index formula in the 1830s.
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