meridian ring globe
21Edward Wright (mathematician) — For the 20th century mathematician, see Edward Maitland Wright. Edward Wright Title page of the first edition of Wright s Certaine Errors in Navigation (1599) …
22Globus — Erdglobus – Globus Blaeu im Staatlichen Historischen Museum in Moskau Ein Globus (Mehrzahl: die Globen oder Globusse; lateinisch für Kugel) ist in der Kartografie ein verkleinertes, kugelförmiges Modell der Erde (terrestrischer Globus oder lat.… …
23Chinese astronomy — The Dunhuang map from the Tang Dynasty (North Polar region). This map is thought to date from the reign of Emperor Zhongzong of Tang (705–710). Founded in Dunhuang, Gansu. Constellations of the three schools were distinguished with different… …
24Maragheh observatory — (Persian:رصدخانه مراغه) is an astronomical observatory which was established in 1259 CE by Nasir al Din al Tusi, an Iranian scientist and astronomer. Located in the heights west of Maragheh, East Azarbaijan province, Iran, it was once considered… …
25Su Song — 蘇頌 (Sū Sòng) Born 1020 near Quanzhou Died 1101 (aged 80–81) Nationality Chinese …
26Pacific Ocean — an ocean bordered by the American continents, Asia, and Australia: largest ocean in the world; divided by the equator into the North Pacific and the South Pacific. 70,000,000 sq. mi. (181,300,000 sq. km); greatest known depth, 35,433 ft. (10,800… …
27United States — a republic in the N Western Hemisphere comprising 48 conterminous states, the District of Columbia, and Alaska in North America, and Hawaii in the N Pacific. 267,954,767; conterminous United States, 3,022,387 sq. mi. (7,827,982 sq. km); with… …
28Titan (moon) — Titan Titan in 2005 by Cassini spacecraft Discovery Discovered by Christiaan Huygens …
29Spherical Earth — Medieval artistic representation of a spherical Earth with compartments representing earth, air, and water (c. 1400). The concept of a spherical Earth dates back to ancient Greek philosophy from around the 6th century BC …
30The Amazing Race 10 — Season run September 17, 2006 – December 10, 2006 Filming dates May 27, 2006 – June 24, 2006 No. of episodes 13 Winning team Tyler Denk James Branaman Continents visited …
