光年
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^ ⇒IAU Recommendations concerning Units Archived 2007年2月16日, at the Wayback Machine.
^ a b ⇒The IAU and astronomical units, International Astronomical Union, ⇒http://www.iau.org/public_press/themes/measuring/ 2008年7月5日閲覧。
^ ⇒Measuring the Universe: The IAU and astronomical units International Astronomical Union 本文の第3段落
^ [1] p.728 p.734
^ P. Kenneth Seidelmann, ed., Explanatory Supplement to the Astronomical Almanac (Mill Valey, California: University Science Books, 1992) 656. ISBN 0-935702-68-7
^ Sierra College, ⇒Basic Constants
^ Marc Sauvage, ⇒Table of astronomical constants
^ Robert A. Braeunig, ⇒Basic Constants
^ C. W. Allen, Astrophysical Quantities (third edition, London: Athlone, 1973) 16. ISBN 0-485-11150-0
^ Arthur N. Cox, ed., Allen's Astrophysical Quantities (fourth edition, New York: Springer-Valeg, 2000) 12. ISBN 0-387-98746-0
^ Nick Strobel, ⇒Astronomical Constants
^ KEKB ⇒Astronomical Constants
^ Thomas Szirtes, Applied dimensional analysis and modeling (New York: McGraw-Hill, 1997) 60.
^ ⇒Sun, Moon, and Earth: Light-year
^ ⇒K6 ASTRONOMICAL CONSTANTS 2014 この表に光年 (light-year) は含まれていない。
^ Fujisawa, K.; Inoue, M.; Kobayashi, H.; Murata, Y.; Wajima, K.; Kameno, S.; Edwards, P. G.; Hirabayashi, H.; Morimoto, M. (2000), “Large Angle Bending of the Light-Month Jet in Centaurus A”, Publ. Astron. Soc. Jpn. 52 (6): 1021?26, ⇒オリジナルの2009年9月2日時点におけるアーカイブ。, https://web.archive.org/web/20090902035920/http://sciencelinks.jp/j-east/article/200123/000020012301A0179284.php
^ Junor, W.; Biretta, J. A. (1994), ⇒“The Inner Light-Month of the M87 Jet”, in Zensus, J. Anton; Kellermann; Kenneth I., Compact Extragalactic Radio Sources, Proceedings of the NRAO workshop held at Socorro, New Mexico, February 11?12, 1994, Green Bank, WV: National Radio Astronomy Observatory (NRAO), p. 97, ⇒http://articles.adsabs.harvard.edu/full/1994cers.conf...97J
^ ⇒IERS Conventions (2003), Chapter 1, Table 1-1.
^ NASA pressrelease (05-131) 24 May 2005: ⇒Voyager Mission Operations Status Report Week Ending March 9, 2007
^ ⇒Spacecraft escaping the Solar System Archived 2007年4月27日, at the Wayback Machine.
^ NASA: ⇒Cosmic Distance Scales - The Nearest Star
^ Proxima Centauri (Gliese 551), Encyclopedia of Astrobiology, Astronomy, and Spaceflight
^ F. Eisenhauer, et al., " ⇒A Geometric Determination of the Distance to the Galactic Center", Astrophysical Journal 597 (2003) L121-L124
^ Gott III, J. Richard; Mario Juri?, David Schlegel, Fiona Hoyle, Michael Vogeley, Max Tegmark, Neta Bahcall, Jon Brinkmann (2005). ⇒“A Map of the Universe”. The Astrophysics Journal 624 (2): 463. arXiv:astro-ph/0310571. Bibcode: 2005ApJ...624..463G. doi:10.1086/428890. ⇒http://www.astro.princeton.edu/universe/ms.pdf.
^ .mw-parser-output cite.citation{font-style:inherit;word-wrap:break-word}.mw-parser-output .citation q{quotes:"\"""\"""'""'"}.mw-parser-output .citation.cs-ja1 q,.mw-parser-output .citation.cs-ja2 q{quotes:"「""」""『""』"}.mw-parser-output .citation:target{background-color:rgba(0,127,255,0.133)}.mw-parser-output .id-lock-free a,.mw-parser-output .citation .cs1-lock-free a{background:url("//upload.wikimedia.org/wikipedia/commons/6/65/Lock-green.svg")right 0.1em center/9px no-repeat}.mw-parser-output .id-lock-limited a,.mw-parser-output .id-lock-registration a,.mw-parser-output .citation .cs1-lock-limited a,.mw-parser-output .citation .cs1-lock-registration a{background:url("//upload.wikimedia.org/wikipedia/commons/d/d6/Lock-gray-alt-2.svg")right 0.1em center/9px no-repeat}.mw-parser-output .id-lock-subscription a,.mw-parser-output .citation .cs1-lock-subscription a{background:url("//upload.wikimedia.org/wikipedia/commons/a/aa/Lock-red-alt-2.svg")right 0.1em center/9px no-repeat}.mw-parser-output .cs1-ws-icon a{background:url("//upload.wikimedia.org/wikipedia/commons/4/4c/Wikisource-logo.svg")right 0.1em center/12px no-repeat}.mw-parser-output .cs1-code{color:inherit;background:inherit;border:none;padding:inherit}.mw-parser-output .cs1-hidden-error{display:none;color:#d33}.mw-parser-output .cs1-visible-error{color:#d33}.mw-parser-output .cs1-maint{display:none;color:#3a3;margin-left:0.3em}.mw-parser-output .cs1-format{font-size:95%}.mw-parser-output .cs1-kern-left{padding-left:0.2em}.mw-parser-output .cs1-kern-right{padding-right:0.2em}.mw-parser-output .citation .mw-selflink{font-weight:inherit}Planck collaboration (2013). "Planck 2013 results. XVI. Cosmological parameters". arXiv:1303.5076 [astro-ph.CO]。
関連項目.mw-parser-output .side-box{margin:4px 0;box-sizing:border-box;border:1px solid #aaa;font-size:88%;line-height:1.25em;background-color:#f9f9f9;display:flow-root}.mw-parser-output .side-box-abovebelow,.mw-parser-output .side-box-text{padding:0.25em 0.9em}.mw-parser-output .side-box-image{padding:2px 0 2px 0.9em;text-align:center}.mw-parser-output .side-box-imageright{padding:2px 0.9em 2px 0;text-align:center}@media(min-width:500px){.mw-parser-output .side-box-flex{display:flex;align-items:center}.mw-parser-output .side-box-text{flex:1}}@media(min-width:720px){.mw-parser-output .side-box{width:238px}.mw-parser-output .side-box-right{clear:right;float:right;margin-left:1em}.mw-parser-output .side-box-left{margin-right:1em}}ウィクショナリーに関連の辞書項目があります。光年
長さの比較
単位の換算一覧
天文単位 - 天文学で使われる長さの単位。
天文学の長さの単位[編集]メートル（SI単位）天文単位光年パーセク
1 m= 1? 6.68459×10?12? 1.05700×10?16? 3.24078×10?17
1 au? 1.49598×1011= 1? 1.58125×10?5? 4.84814×10?6
1 ly? 9.46073×1015? 6.32411×104= 1? 3.06601×10?1
1 pc? 3.08568×1016? 2.06265×105? 3.26156= 1
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