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ephemeris

(Encyclopedia)ephemeris ĭfĕmˈərĭs [key] (pl., ephemerides), table listing the position of one or more celestial bodies for each day of the year. The French publication Connaissance de Temps is the oldest of th...

Hume, David

(Encyclopedia)Hume, David hyo͞om [key], 1711–76, Scottish philosopher and historian. Educated at Edinburgh, he lived (1734–37) in France, where he finished his first philosophical work, A Treatise of Human Nat...

Fredericksburg

(Encyclopedia)Fredericksburg. 1 Town (2020 pop. 10,875), Gillespie co., S central Texas, in the Texas Hill Country near the Pedernales River; inc. 1928. Located in an...

Jarrett, Keith

(Encyclopedia) Jarrett, Keith , 1945- , American jazz pianist and composer, b. Allentown, Pa. A child prodigy on the piano, Jarrett was exposed to contemporary jazz d...

Natchez, indigenous people of North America

(Encyclopedia)Natchez năchˈĭz [key], indigenous North American people who lived along St. Catherine's Creek east of the present-day city of Natchez in Mississippi. At the time of contact with the French in 1682,...

Northern Expedition

(Encyclopedia)Northern Expedition, in modern Chinese history, the military campaign by which the Kuomintang party overthrew the warlord-backed Beijing government and established a new government at Nanjing. At the ...

Kuiper, Gerard Peter

(Encyclopedia)Kuiper, Gerard Peter or Gerrit Pieter gĕrˈĭt pēˈtər kīˈpər [key], 1905–73, American astronomer, b. the Netherlands. Kuiper is considered to be the father of modern planetary science for his...

synodic period

(Encyclopedia)synodic period sĭnŏdˈĭk [key], in astronomy, length of time during which a body in the solar system makes one orbit of the sun relative to the earth, i.e., returns to the same elongation. Because ...

probability

(Encyclopedia)probability, in mathematics, assignment of a number as a measure of the “chance” that a given event will occur. There are certain important restrictions on such a probability measure. In any exper...

computer graphics

(Encyclopedia)computer graphics, the transfer of pictorial data into and out of a computer. Using analog-to-digital conversion techniques, a variety of devices—such as curve tracers, digitizers, and light pens—...