rate of a chronometer
71Omega Speedmaster — Moonwatch redirects here. For the science program, see Operation Moonwatch. Omega Speedmaster Omega Speedmaster Professional Ref. 145.012 Manufacturer Omega Also called …
72Nuclear timescale — In astrophysics, the nuclear timescale is an estimate of the lifetime of a star based solely on its rate of fuel consumption. Along with the thermal and dynamical time scales, it is used to estimate the length of time a particular star will… …
73Equinox — This article is about the astronomical event when the sun is at zenith over the Equator. For other uses, see Equinox (disambiguation). For the same event happening on other planets and setting up a celestial coordinate system, see Equinox… …
74Daylight saving time — This article is about daylight saving time in general. For DST in a specific location, see Daylight saving time by country. Summer time and DST redirect here. For other uses, see Summer time (disambiguation) and DST (disambiguation) …
75Lincolnshire — For other places with the same name, see Lincolnshire (disambiguation). Coordinates: 53°4′N 0°11′W / 53.067°N 0.183°W / 53.067; 0.183 …
76Metronome — For other uses, see Metronome (disambiguation). Mechanical metronome A metronome is any device that produces regular, metrical ticks (beats, clicks) settable in beats per minute. These ticks represent a fixed, regular aural pulse; some metronomes …
77Dead reckoning — For other uses, see Dead reckoning (disambiguation). The navigator plots his 9am position, indicated by the triangle, and, using his course and speed, estimates his position at 9:30am and 10am. In navigation, dead reckoning (also ded (for… …
78Geochronology — A schematic depiction of the major events in the history of our planet. Geochronology is the science of determining the age of rocks, fossils, and sediments, within a certain degree of uncertainty inherent to the method used. A variety of dating… …
79Culture of the United Kingdom — The Proms is an eight week summer season of daily orchestral classical music concerts, on the last night with some traditional patriotic music of the United Kingdom.[1][2] …
80History of technology — The history of technology is the history of the invention of tools and techniques. Background knowledge has enabled people to create new things, and conversely, many scientific endeavors have become possible through technologies which assist… …
