Portal:Time

08:58, November 24, 2011 (UTC) (update)
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Time

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edit   Time Time is a fundamental component of measuring systems and has long been a major subject of art, philosophy, and science. In physics and other sciences, time is considered a fundamental quantity; part of the basic structure of the universe, a dimension in which events occur in sequence. The unit of time in the International System of Units (SI) is the second...   Read more... edit   Time Help ↑ Current date & time at top of page; refresh or purge to update Help:Variable How to display time WP:Date math Wikipedia time coding WP:Timeline General timeline help Help:Calendar Time display examples Portal:Current events News & current events WP:Timeline standards Manual of Style listing More Time & Date Templates: Time, date and calendar templates Date mathematics templates ↓ For Wikipedia articles, see TIME TOPICS below ↓ edit   Time Topics Time (book) touches upon nearly every topic in some way. Some of the most relevant are below: edit   Selected article A chronometer watch is a watch tested and certified to meet certain precision standards. In Switzerland, only timepieces certified by the COSC may use the word 'Chronometer' on them. However, numerous prominent Swiss watch manufacturers do not submit their movements for COSC certification, although such movements would probably easily qualify as chronometers under the COSC certification rules. The term chronometer is also used to describe a marine chronometer used for celestial navigation. The marine chronometer was invented by John Harrison in 1730. This was the first iteration of a series of chronometers which enabled accurate marine navigation. For the next 250 years, an accurate chronometer was essential to any kind of marine or air navigation until the implementation of global satellite navigation at the end of the 20th century. The marine chronometer is no longer used for navigation. Read more... Portal:Time/Selected Article archive/November 2011 Suggest edit   Selected picture Portal:Time/Selected picture archive/November 2011 Archive - Suggest a picture... edit   Selected biography Portal:Time/Selected biography archive/November 2011 Suggest edit   Did you know... ...that the second was known as a "second minute", the second small division of an hour. ...that the second is defined as the duration of 9,192,631,770 oscillations between the two hyperfine levels of the ground state in the Cesium-133 atom. ...that the smallest unit of time that could ever be measured is the Planck time (~ 5.4 × 10−44 seconds). ..that despite Herodotus's claim that the sundial was invented in Babylon, the oldest known example is from Egypt? ... that merkhets were Ancient Egyptian timekeeping devices that tracked the movement of certain stars over the meridian in order to ascertain the time during the night, when sundials could not function? edit   Things you can do - Carpe diem because Tempus fugit Vital Articles The Wikipedia 1.0 Editorial team identified the following articles relating to Time as Vital: "for which Wikipedia should have a corresponding high-quality article, and ideally a featured article." Those marked with this icon: are also considered to be Core articles, "one of the core set of articles every encyclopedia should have." Their quality-scale rating as of February 2008 is listed alongside each: Calendar - B Clock - B Day - B History - B Month - B Second - B Time - B Week - B Year - Start Any help in improving these articles would not only further the efforts of WikiProject Time, but Wikipedia overall. Add portal links to articles Time portal Spread the word by posting this portal link in the See Also sections of time-themed articles, using this code: {{Portal|Time}} Note that the Time templates (posted in Topics on each page of this Portal) all contain a link back to the Portal, so if an article has one of those templates, it doesn't technically need another link. Otherwise, knock yourselves out! edit   Related portals History Physics Science Space Technology Wikipedia portals: Culture Geography Health History Mathematics Natural sciences People Philosophy Religion Society Technology What are portals? · List of portals · Featured portals edit   WikiProjects WikiProject Time Descendant WikiProjects WikiProject Calendars WikiProject Days of the Year WikiProject Watches WikiProject Years Related WikiProjects WikiProject Holidays WikiProject Timeline Tracer WikiProject Years in science edit   Associated Wikimedia Time on Wikiquote Quotations Time on Wikibooks Manuals & Texts Time on Wikisource Texts Time on Wiktionary Definitions Time on Wikimedia Commons Images & Media edit   Categories [−] Time [+] Time by region [+] Causality [+] Time and fate deities [+] Future [+] Length [+] Time management [+] Time measurement [+] Motion [+] Nostalgia [+] Phenomena [+] Philosophy of time [+] Rhythm [+] Time travel [×] Wikipedia books on time edit   Quotes Tu ne quaesieris, scire nefas, quem mihi, quem tibi Leuconoe, don't ask — it's dangerous to know — finem di dederint, Leuconoe, nec Babylonios what end the gods will give me or you. Don't play with Babylonian temptaris numeros. ut melius, quidquid erit, pati. fortune-telling either. Better just deal with whatever comes your way. seu pluris hiemes seu tribuit Iuppiter ultimam, Whether you'll see several more winters or whether the last one quae nunc oppositis debilitat pumicibus mare Jupiter gives you is the one even now pelting the rocks on the shore with the waves Tyrrhenum: sapias, vina liques et spatio brevi of the Tyrrhenian sea — be smart, drink your wine. Scale back your long hopes spem longam reseces. dum loquimur, fugerit invida to a short period. Even as we speak, envious time aetas: carpe diem quam minimum credula postero. is running away from us. Seize the day, trusting little in the future. —Horace, Odes 1.11