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blink microscope
(Encyclopedia)blink microscope, in astronomy, device for determining a change in position or magnitude (brightness) of a star relative to other stars in the background. Two photographs of the same field or area of ...quadrature
(Encyclopedia)quadrature, in astronomy, arrangement of two celestial bodies at right angles to each other as viewed from a reference point. If the reference point is the earth and the sun is one of the bodies, a pl...Amici, Giovanni Battista
(Encyclopedia)Amici, Giovanni Battista jōvänˈnē bät-tēsˈtä ämēˈchē [key], 1786–1863, Italian astronomer, mathematician, and naturalist. He became director of the observatory and professor of astronomy...altitude
(Encyclopedia)altitude, vertical distance of an object above some datum plane, such as mean sea level or a reference point on the earth's surface. It is usually measured by the reduction in atmospheric pressure wit...anesthesia
(Encyclopedia)anesthesia ănĭsthēˈzhə [key] [Gr.,=insensibility], loss of sensation, especially that of pain, induced by drugs, especially as a means of facilitating safe surgical procedures. Early modern medic...Sigüenza y Góngora, Carlos de
(Encyclopedia)Sigüenza y Góngora, Carlos de kärˈlōs ᵺā sēgwānˈsä ē gōngˈgōrä [key], 1645–1700, Mexican writer and humanist. The foremost intellectual figure of colonial Mexico, he wrote on mathem...Abbo of Fleury
(Encyclopedia)Abbo of Fleury äbōˈ, flörēˈ [key], Fr. Abbon de Fleury, 945?–1004, French monk at the abbey of Fleury (at present-day Saint-Benoît-sur-Loire, France). Head of the monastery school, he later t...Izvolsky, Aleksandr Petrovich
(Encyclopedia)Izvolsky, Aleksandr Petrovich əlyĭksänˈdər pētrôˈvĭch ēzvôlˈskē [key], 1856–1919, Russian diplomat instrumental in fostering the Triple Entente with France and Great Britain. He rose in...planetary science
(Encyclopedia)planetary science or planetology, study of planets and planetary systems as a whole. Planetary science applies the theories and methods of traditional disciplines such as astronomy, geology, physics, ...Darwin, Sir George Howard
(Encyclopedia)Darwin, Sir George Howard, 1845–1912, English astronomer and mathematician; 2d son of Charles Darwin. He was Plumian professor (from 1883) of astronomy and experimental philosophy at Cambridge, and ...Browse by Subject
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