geodetic instrument
61Giovanni Sante Gaspero Santini — Giovanni Sante Gaspero Santini † Catholic Encyclopedia ► Giovanni Sante Gaspero Santini Astronomer, b. at Caprese in Tuscany, 30 Jan., 1787; d. at Padua, 26 June, 1877. He received his first instruction from his parental uncle, the… …
62Gravitational lens — Gravitational Lensing Formalism Strong lensing …
63Prime Meridian — 0° Prime Meridian …
64Plessey — The Plessey Company plc was a British based international electronics, defence and telecommunications company. It originated in 1917, growing and diversifying into electronics. It expanded after the second world war by acquisition of companies… …
65Apache Point Observatory Lunar Laser-ranging Operation — APOLLO shooting a laser at the Moon. The laser pulse is reflected from the retroreflectors on the Moon (see below) and returned to the telescope. The round trip time tells the distance to the Moon to great accuracy. In this picture the Moon is… …
66Macrometer — A macrometer is an instrument for measuring the size and distance of distant objects. Distant in this sense means a length that can not be readily measured by a calibrated length. The optical version of this instrument used two mirrors on a… …
67History of navigation — In the pre modern history of human migration and discovery of new lands by navigating the oceans, a few peoples have excelled as sea faring explorers. Prominent examples are the Phoenicians, the ancient Greeks, the Persians, the Arabians, the… …
68ELLX — Dieser Artikel oder Abschnitt bedarf einer Überarbeitung. Näheres ist auf der Diskussionsseite angegeben. Hilf mit, ihn zu verbessern, und entferne anschließend diese Markierung …
69L'Aéroport de Luxembourg — Dieser Artikel oder Abschnitt bedarf einer Überarbeitung. Näheres ist auf der Diskussionsseite angegeben. Hilf mit, ihn zu verbessern, und entferne anschließend diese Markierung …
70Applications Des Satellites — Cet article décrit les diverses applications des satellites. Sommaire 1 Qu est ce qu un satellite artificiel ? 2 Les différents types de satellites artificiels 2.1 Satellite scientifique …
