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  2. Time in the Republic of Ireland - Wikipedia

    en.wikipedia.org/.../Time_in_the_Republic_of_Ireland

    Ireland uses Irish Standard Time ( IST, UTC+01:00; Irish: Am Caighdeánach Éireannach) in the summer months and Greenwich Mean Time ( UTC+00:00; Irish: Meán-Am Greenwich) in the winter period. [ 1] Roughly two-thirds of the Republic is located west of the 7.5°W meridian. Thus the local mean time in most of Ireland is closer to UTC-01:00 time ...

  3. Power of 10 - Wikipedia

    en.wikipedia.org/wiki/Power_of_10

    Power of 10. Visualisation of powers of 10 from one to 1 trillion. A power of 10 is any of the integer powers of the number ten; in other words, ten multiplied by itself a certain number of times (when the power is a positive integer). By definition, the number one is a power (the zeroth power) of ten. The first few non-negative powers of ten are:

  4. Coins of the Republic of Ireland - Wikipedia

    en.wikipedia.org/wiki/Coins_of_the_Republic_of...

    One side of euro coins is common across the eurozone, it is the obverse which has a design unique to Ireland. Although some other countries used more than one design, or even a separate design for each of the eight coins (1c, 2c, 5c, 10c, 20c, 50c, €1 and €2), Ireland used only one design.

  5. List of Irish Singles Chart Christmas number ones - Wikipedia

    en.wikipedia.org/wiki/List_of_Irish_Singles...

    Dermot Kennedy, who held Number One in 2020, was the first Irishman to score Christmas number one since Mario Rosenstock in 2005. Year. Artist. Song. 1962. Elvis Presley. "Return to Sender". 1963.

  6. Jiffy (time) - Wikipedia

    en.wikipedia.org/wiki/Jiffy_(time)

    In astrophysics and quantum physics a jiffy is, as defined by Edward R. Harrison, [ 13] the time it takes for light to travel one fermi, which is approximately the size of a nucleon. One fermi is 10−15 m, so a jiffy is about 3 × 10−24 s. It has also more informally been defined as "one light-foot", which is equal to approximately one ...

  7. Universal Time - Wikipedia

    en.wikipedia.org/wiki/Universal_Time

    Universal Time (UT or UT1) is a time standard based on Earth's rotation. [1] While originally it was mean solar time at 0° longitude, precise measurements of the Sun are difficult. Therefore, UT1 is computed from a measure of the Earth's angle with respect to the International Celestial Reference Frame (ICRF), called the Earth Rotation Angle ...

  8. History of timekeeping devices - Wikipedia

    en.wikipedia.org/wiki/History_of_timekeeping_devices

    The time was determined by observing particular stars as they crossed the meridian. [24] The Jantar Mantar in Jaipur built in 1727 by Jai Singh II includes the Vrihat Samrat Yantra, 88 feet (27 m) tall sundial. [25] It can tell local time to an accuracy of about two seconds. [26]

  9. Googolplex - Wikipedia

    en.wikipedia.org/wiki/Googolplex

    If each book had a mass of 100 grams, all of them would have a total mass of 10 93 kilograms. In comparison, Earth's mass is 5.972 × 10 24 kilograms, the mass of the Milky Way galaxy is estimated at 2.5 × 10 42 kilograms, and the total mass of all the stars in the observable universe is estimated at 2 × 10 52 kg. [4]