velocity stability
111History of radar — The history of radar starts with experiments by Heinrich Hertz in the late 19th century that showed that radio waves were reflected by metallic objects. This possibility was suggested in James Clerk Maxwell s seminal work on electromagnetism.… …
112Pulse-Doppler radar — Pulse Doppler is a radar system capable of not only detecting target location (bearing, range, and altitude), but also measuring its radial velocity (range rate). It uses the Doppler effect to determine the relative velocity of objects; pulses of …
113HD 28185 b — Planetbox begin name = HD 28185 bPlanetbox star star = HD 28185 constell = Eridanus RA = RA|04|26|26.3205 DEC = DEC|−10|33|02.955 dist ly = 148 dist pc = 46 class = G5VPlanetbox orbit semimajor = 1.031 ± 0.060 eccentricity = 0.070 ± 0.040 period …
114Insect wing — Original veins and wing posture of a dragonfly. Hoverflies hovering to mate …
115Origin of avian flight — The Berlin Archaeopteryx, one of the earliest known birds. Evolution of flight redirects here. See also flying and gliding animals and insect flight. Around 350 BCE, Aristotle and other philosophers of the time were attempting to explain the… …
116Europe, history of — Introduction history of European peoples and cultures from prehistoric times to the present. Europe is a more ambiguous term than most geographic expressions. Its etymology is doubtful, as is the physical extent of the area it designates.… …
117Monetary economics — Economics …
118Dark matter — Not to be confused with antimatter, dark energy, dark fluid or dark flow. For other uses, see Dark Matter (disambiguation) …
119Tau Ceti — Starbox begin name=Tau Ceti Starbox image caption=Tau Ceti (highlighted center) in the southern part of the constellation Cetus. Starbox observe epoch=J2000 constell=Cetus ra=RA|01|44|04.0829cite web url=http://simbad3.u strasbg.fr/sim… …
120Action potential — In physiology, an action potential is a short lasting event in which the electrical membrane potential of a cell rapidly rises and falls, following a consistent trajectory. Action potentials occur in several types of animal cells, called… …
