light year| 有名人の最新ニュースを読者にお届けします。

私たちは、人々が好きな有名人について読んで、それについて気分を良くすることができるスペースを作りたかったのです.私たちは、人々が有名人についてポジティブな方法でゴシップできる場所を作りたかった.
私たちは、何年もの間、日本のエンターテインメント ニュースを生き、呼吸してきた情熱的なエンターテインメント ニュース ジャンキーの小さなチームです。

light year, 2022-05-05, Lightyear | Tráiler Oficial | Doblado, Un equipo de proporciones épicas. 😎🚀✨

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lightyearの使い方と意味

• lightyear

  → light-year

• light-year

• light-years ahead

  はるかに先を行く

• light-years away

  《be ～》＿光年の距離｛きょり｝にある

• light-years away from the solar system

  《be ～》太陽系｛たいようけい｝から＿光年離｛こうねん はな｝れている
  【表現パターン】light-years (away) from the solar system

• __ light-years apart from each other

  《be ～》お互｛たが｝いに＿光年離｛こうねん はな｝れている

• __ light-years from Earth

  地球｛ちきゅう｝から＿光年｛こうねん｝（で［の］）

• some light-years away

  何光年｛なん こうねん｝か離｛はな｝れて

• lie __ light-years away

  〔星が〕＿光年｛こうねん｝の距離｛きょり｝にある
  【表現パターン】lie __ l.y. [light-years] away

• located __ light-years away from

  《be ～》〔天体｛てんたい｝などが〕～から＿光年離｛こうねん はな｝れた場所｛ばしょ｝にある
  【表現パターン】located __ light-years (away) from

詳細については、次の URL をご覧ください。……

Definitions[edit]

As defined by the IAU, the light-year is the product of the Julian year^{[note 2]} (365.25 days, as opposed to the 365.2425-day Gregorian year or the 365.24219-day Tropical year that both approximate) and the speed of light (299792458 m/s).^{[note 3]} Both of these values are included in the IAU (1976) System of Astronomical Constants, used since 1984.^[5] From this, the following conversions can be derived. The IAU-recognized abbreviation for light-year is “ly“,^[2] although other standards like ISO 80000 uses “l.y.“^[6][7] and localized abbreviations are frequent, such as “al” in French (from année-lumière), Spanish (from año luz), Italian (from anno luce), “Lj” in German (from Lichtjahr), etc.

Before 1984, the tropical year (not the Julian year) and a measured (not defined) speed of light were included in the IAU (1964) System of Astronomical Constants, used from 1968 to 1983.^[8] The product of Simon Newcomb‘s J1900.0 mean tropical year of 31556925.9747 ephemeris seconds and a speed of light of 299792.5 km/s produced a light-year of 9.460530×10¹⁵ m (rounded to the seven significant digits in the speed of light) found in several modern sources^[9][10][11] was probably derived from an old source such as C. W. Allen‘s 1973 Astrophysical Quantities reference work,^[12] which was updated in 2000, including the IAU (1976) value cited above (truncated to 10 significant digits).^[13]

Other high-precision values are not derived from a coherent IAU system. A value of 9.460536207×10¹⁵ m found in some modern sources^[14][15] is the product of a mean Gregorian year (365.2425 days or 31556952 s) and the defined speed of light (299792458 m/s). Another value, 9.460528405×10¹⁵ m,^[16] is the product of the J1900.0 mean tropical year and the defined speed of light.

Abbreviations used for light-years and multiples of light-years are

• “ly” for one light-year^[2]
• “kly” for a kilolight-year (1,000 light-years)^[17]
• “Mly” for a megalight-year (1,000,000 light-years)^[18]
• “Gly” for a gigalight-year (1,000,000,000 light-years)^[19]

詳細については、次の URL をご覧ください。……

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