Rujukan Tahun

Rujukan Tahun_tropika

"Astronomical almanac online glossary". US Naval Observatory. 2015.
Astronomical almanac for the year 2011. Washington: Astronomical Almanac Office US Naval Observatory. 2010.
Astronomical Applications Dept. of United States Naval Observatory (2009). Multiyear interactive computer almanac. 2.2. Richmond VA: Willman-Bell.
Blackburn, B.; Holford-Strevens, L. (2003). The Oxford companion to the year. Oxford University Press. Corrected reprint of 1999.
Borkowski, K.M. (1991). "The tropical year and the solar calendar" (PDF). Journal of the Royal Astronomical Society of Canada. 85 (3): 121–130. Bibcode:1991JRASC..85..121B.
"The International System of Units". Bureau International des Poids et Mesures. 2006. Diarkibkan daripada asal pada October 1, 2009.
Butrica, A.J. (1996). "NASA SP-4218: To see the unseen—A history of planetary radar astronomy". NASA. Diarkibkan daripada asal pada August 23, 2007.
Dershowitz, N.; Reingold, E.M. (2008). Calendrical calculations (edisi 3rd). Cambridge University Press. ISBN 978-0-521-70238-6.
Dobrzycki, J. (1983). "Astronomical aspects of the calendar reform". dalam Coyne, G.V.; Hoskin, M.A.; Pedersen, O. Gregorian reform of the calendar. Vatican Observatory.
International Earth Rotation Service (2 February 2017). "Bulletin A 30(5)". US Naval Observatory.
Jet Propulsion Laboratory (2005). DSN: History. NASA.
Laskar, J. (1986). "Secular terms of classical planetary theories using the results of general theory". Astronomy and Astrophysics. 157: 59–70. Bibcode:1986A&A...157...59L. ISSN 0004-6361. Note: In the article at this URL page 68 should be put before page 66.
McCarthy, D.D.; Seidelmann, P.K. (2009). Time from Earth rotation to atomic physics. Weinhein: Wiley-VCH Verlag GmbH & Co. KGaA.
Meeus, J.; Savoie, D. (1992). "The history of the tropical year". Journal of the British Astronomical Association. 102 (1): 40–42. Bibcode:1992JBAA..102...40M.
Morrison, L.V.; Stephenson, F.R. (2004). "Historical values of the Earth's clock error ΔT and the calculation of eclipses". Journal for the History of Astronomy. 35, Part 3 (120): 327–336. Bibcode:2004JHA....35..327M.
Newcomb, S. (1898). Tables of the four inner planets. Astronomical papers prepared for the use of the American ephemeris and nautical almanac. 6 (edisi 2nd). Washington: Bureau of Equipment, Navy Department.
North, J.D. (1983). "The Western calendar - 'Intolerabilis, horribilis, et derisibilis'; four centuries of discontent". dalam Coyne, G.V.; Hoskin,, M.A.; Pedersen, O. Gregorian reform of the calendar. Vatican Observatory.
Richards, E.G. (2013). "Calendars". dalam Urban, S.E.; Seidelmann, P. K. Explanatory Supplement to the Astronomical Almanac (PDF) (edisi 3rd). Mill Valley, CA: University Science Books. m/s. 585–624. ISBN 978-1-891389-85-6.
Seidelmann, P. K., penyunting (1992). Explanatory Supplement to the Astronomical Almanac (edisi 2nd). Sausalito, CA: University Science Books. ISBN 0-935702-68-7.
tropic. American Heritage Dictionary (edisi 3rd). Boston: Houghton-Mifflin. 1992.
Urban, S.E.; Seidelmann, P. K., para penyunting (2013). Explanatory supplement to the astronomical almanac (edisi 3rd). Mill Valley, CA: University Science Books. ISBN 978-1-891389-85-6.

L b s Ukuran dan piawaian waktu
Subjek utama	Masa Kronometri Turutan magnitud Metrologi
Piawaian antarabangsa	UTC Ofset UTC UT ΔT DUT1 IERS ISO 31-1 ISO 8601 Jam 12 jam Jam 24 jam Saat lompat TAI Waktu awam Waktu Bumi Waktu jimat siang Waktu Koordinat Geopusat Waktu Koordinat Baripusat Waktu suria Garisan Tarikh Antarabangsa Zon waktu
Piawaian lampau	Waktu Dinamik Baripusat Waktu efemeris Waktu Min Greenwich Meridian Perdana
Masa dalam fizik	Dekad kosmologi Dilasi masa Dilasi masa graviti Domain masa Epok Planck Kronon Masa dan ruang mutlak Masa diskret dan masa selanjar Masa Planck Masa wajar Ruang-masa Simetri T Teori kerelatifan Waktu koordinat Waktu selanjar
Horologi	Jam Astrarium Jam air Jam atom Jam matahari Jam pasir Jam pasir marin Jam radio Jam tangan Komplikasi Kronometer marin Sejarah jam Persamaan masa
Takwim	Astronomi Epak Ekuinoks Interkalasi Minggu tujuh hari Solstis Tahun lompat Qamari Qamari-suria Suria Gregorius Ibrani Islam Julius
Kaji purba dan kaji bumi	Kaedah tentu umur Skala masa geologi Suruhanjaya Stratigrafi Antarabangsa
Kronologi astronomi	Liukan Masa ikut bintang Skala masa nuklear Tahun galaksi
Unit masa	Saat Minit Jam Hari Minggu Bulan Tahun Dekad Abad Alaf
Topik berkaitan	Kronologi Kronometri mental Nilai masa wang Penjaga masa Waktu metrik Waktu sistem Tempoh

Berkaitan

Tahun Tahun Baru Cina Tahun liturgi Tahun Masihi Tahun Kesedihan Tahun Baru Tahun Melawat Malaysia 2007 Tahun Melawat Malaysia 2014 Tahun tropika Tahun Melawat Malaysia

Rujukan

WikiPedia: Tahun_tropika http://adsabs.harvard.edu/abs/1986A&A...157...59L http://adsabs.harvard.edu/abs/1991JRASC..85..121B http://adsabs.harvard.edu/abs/1992JBAA..102...40M http://adsabs.harvard.edu/abs/2004JHA....35..327M http://articles.adsabs.harvard.edu/cgi-bin/nph-iar... http://aa.usno.navy.mil/publications/docs/c15_usb_... http://asa.usno.navy.mil/SecM/Glossary.html http://maia.usno.navy.mil/ser7/ser7.dat http://www.bipm.org/en/si/si_brochure/general.html //www.worldcat.org/issn/0004-6361