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Lighthouses: FAQ

Source: The United States Coast Guard Our first lighthouses were actually given to us by Nature. Sailors sometimes used landmarks such as glowing volcanoes to guide them. In the Ancient World,…

Cyrus ALDRICH, Congress, MN (1808-1871)

ALDRICH, Cyrus, a Representative from Minnesota; born in Smithfield, R.I., June 18, 1808; attended the common schools; followed the occupations of sailor, boatman, farmer, contractor on public…

Louis Adams FROTHINGHAM, Congress, MA (1871-1928)

FROTHINGHAM, Louis Adams, a Representative from Massachusetts; born in Jamaica Plain, Mass., July 13, 1871; attended the public schools and Adams Academy; was graduated from Harvard University…

James DE WOLF, Congress, RI (1764-1837)

Senate Years of Service: 1821-1825Party: Democratic Republican; Crawford RepublicanDE WOLF, James, a Senator from Rhode Island; born in Bristol, R.I., March 18, 1764; during the Revolutionary…

Aristarchus of Samos

(Encyclopedia) Aristarchus of SamosAristarchus of Samosărˌĭstärˈkəs, [key]Aristarchus of Samosărˌĭstärˈkəs, sāˈmŏs [key], fl. c.310 b.c.–c.230 b.c., Greek astronomer and mathematician of the…

center of mass

(Encyclopedia) center of mass, the point at which all the mass of a body may be considered to be concentrated in analyzing its motion. The center of mass of a sphere of uniform density coincides with…

Our Solar System (in order from the Sun)

by Mark Hughes Our solar system consists of a bright yellow star, eight planets, nearly 150 moons, and thousands of smaller objects like asteroids and comets. If you wanted to see all eight planets…

DK Science: Space

UNIVERSEMATTER IN THE UNIVERSEOUR PLACE IN THE UNIVERSECROWDED CITYOUR PLANETTHE SOLAR SYSTEMOUR GALAXYTHE EXPANDING UNIVERSEWHERE SPACE BEGINSUNIVERSAL FORCESFIND OUT MOREBIG BANGTIMELINE OF THE…