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Chinguetti

(Encyclopedia)Chinguetti, town, central Mauritania, on the Adrar Plateau east of Atar. Founded in the 8th cent., it was a center on several trans-Saharan trade routes...

Guðmundsson, Kristmann

(Encyclopedia)Guðmundsson, Kristmann krĭstˈmän gvüᵺˈmünsôn [key], 1901–83, Icelandic novelist. Guðmundsson lived in Norway from 1924 to 1937 and wrote in both Norwegian and Icelandic. His sensitive nov...

mean

(Encyclopedia)mean, in statistics, a type of average. The arithmetic mean of a group of numbers is found by dividing their sum by the number of members in the group; e.g., the sum of the seven numbers 4, 5, 6, 9, 1...

solar constant

(Encyclopedia)solar constant, the average amount of radiant energy received by the earth's atmosphere from the sun; its value is about 2 calories per min incident on each square centimeter of the upper atmosphere. ...

galleon

(Encyclopedia)galleon, oceangoing warship used by the European naval powers in the 15th and 16th cent. A large, cumbersome vessel, the galleon was three-masted and square-rigged, usually with two decks, and with it...

Cambridge, cities, United States

(Encyclopedia)Cambridge. 1 City (2020 pop. 13,096), seat of Dorchester co., E Md., Eastern Shore, a port of entry on the Choptank River at its mouth on ...

Andromeda, in astronomy

(Encyclopedia)Andromeda, in astronomy, northern constellation located to the NE of Pegasus and to the S of Cassiopeia. Its brightest star, Alpheratz (Alpha Andromedae), marks the northeast corner of the Great Squar...

Ramla

(Encyclopedia)Ramla or Ramleh both: rämˈlĕ [key] [Arab.,=sand], town (1994 pop. 57,300), central Israel, in a farming area. Ramla may be the biblical Ramathaim-zophim, but more probably it was founded (c.716) by...

chess

(Encyclopedia)chess, game for two players played on a square board composed of 64 square spaces, alternately dark and light in color. London was the site of the first modern international chess tournament in 1851...

Kepler's laws

(Encyclopedia)CE5 Schematic representation of Kepler's second law: The areas ABF and A′B′F′ are equal and are swept out in equal intervals of time by a planet orbiting around the sun (at F). Kepler's laws...