obscuration period
21List of astronomy acronyms — This is a compilation of acronyms commonly used in astronomy. Most of the acronyms are drawn from professional astronomy and are used quite frequently in scientific publications. However, a few of these acronyms are frequently used by the general …
22Beethoven quadrangle — The Beethoven quadrangle is located in the equatorial region of Mercury, in the center of the area imaged by Mariner 10. Most pictures of the quadrangle were obtained at high sun angles as the Mariner 10 spacecraft receded from the planet.… …
23eye disease — Introduction any of the diseases or disorders that affect the human eye (eye, human). This article briefly describes the more common diseases of the eye and its associated structures, the methods used in examination and diagnosis, and the… …
24National Weather Service — NWS Agency overview Formed February 9, 1870 Jurisdiction …
25Tulpa — Part of a series on Tibetan Buddhism …
26Dong-a Ilbo — Infobox Newspaper name = caption = A Girl Reading DongA Ilbo type = Daily newspaper format = Broadsheet foundation = 1920 owners = DongA Ilbo Co. publisher = CEO Kim, Jae Ho political position = headquarters = DongA Media Centre 139 110/715 Se… …
27Dinsmore Alter — (March 28, 1888 – September 20, 1968) was an American astronomer and meteorologist. He was born in Colfax, Washington, and attended college at Westminster College in Pennsylvania. After graduating in 1909 with a B.S. degree, he married Ada… …
28Small unit tactics — is the application of military doctrine for the combat deployment of platoons and smaller units in a particular strategic and logistic environment.quad StructureThe composition of a squad falls into three broad categories; classical, balanced and …
29Automated airport weather station — Automated airport weather stations are automated sensor suites which are designed to serve aviation and meteorological observing needs for safe and efficient aviation operations and weather forecasting. Automated airport weather stations have… …
30Moving target indication — (MTI) is a mode of operation of a radar to discriminate a target against clutter. [1] In contrast to another mode, stationary target indication, it takes an advantage of the fact that the target moves with respect to stationary clutter. The most… …
