aerial magnetic survey
21Manhattan Project — This article is about the atomic bomb project. For other uses, see Manhattan Project (disambiguation). Manhattan District The Manhattan Project created the first nuclear bombs. The Trinity test …
22Business and Industry Review — ▪ 1999 Introduction Overview Annual Average Rates of Growth of Manufacturing Output, 1980 97, Table Pattern of Output, 1994 97, Table Index Numbers of Production, Employment, and Productivity in Manufacturing Industries, Table (For Annual… …
23Lockheed P-3 Orion — P 3 Orion A P 3C Orion of Patrol Squadron 22 (VP 22) flies over Japan, 1 December 1991. Role Maritime p …
24coal mining — Coal was very important in the economic development of Britain. It was used as fuel in the factories built during the Industrial Revolution and continued to be important until the 1980s. The main coalfields are in north east England, the north… …
25Unidentified flying object — UFO redirects here. For other uses, see UFO (disambiguation). Photograph of alleged UFO, New Jersey, July 31, 1952 A term originally coined by …
26Orienteering map — An orienteering map is a map specially prepared for use in orienteering competitions. It is a topographic map with extra details to help the competitor navigate through the competition area. These maps are much more detailed than general purpose… …
27Photography — is the art, science and practice of creating durable images by recording light or other electromagnetic radiation, either electronically by means of an image sensor or chemically by means of a light sensitive material such as photographic… …
28Marie Byrd Land — Map of Antarctica; Marie Byrd Land is in the bottom left between the New Zealand and Chilean claims …
29Impact event — Artist s impression of a major impact event. The collision between Earth and an asteroid a few kilometers in diameter may release as much energy as several million nuclear weapons detonating simultaneously. An impact event is the collision of a… …
30Remote sensing — There are two kinds of remote sensing. Passive sensors detect natural energy (radiation) that is emitted or reflected by the object or surrounding area being observed. Reflected sunlight is the most common source of radiation measured by passive… …
