Tahun tropis: Perbedaan antara revisi
Konten dihapus Konten ditambahkan
k Robot: Perubahan kosmetika |
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* Morrison, L. V. & Stephenson, F. R. (2004). [http://adsabs.harvard.edu/abs/2004JHA....35..327M Historical values of the Earth's clock error ΔT and the calculation of eclipses]. ''Journal for the History of Astronomy'' Vol. 35, Part 3, No. 120, p. 327–336
* Newcomb, S. (1898). ''Tables of the four inner planets'' (Vol. 6) in ''Astronomical papers prepared for the use of the American ephemeris and nautical almanac'' (2nd ed.). Washington: Bureau of Equipment, Navy Dept.
* North, J. D. (1983). The Western calendar - "Intolerabilis, horribilis, et derisibilis"; four centuries of discontent. In [[George Coyne|G. V. Coyne]], M. A. Hoskin, & O. Pedersen (Eds.). ''Gregorian reform of the calendar''. Vatican Observatory.
* Seidelmann, P. K. (Ed.). (1992). ''Explanatory supplement to the Astronomical almanac''. Sausalito, CA: University Science Books. ISBN 0-935702-68-7
* tropic. (1992). ''American Heritage Dictionary'', 3rd ed. Boston: Houghton-Mifflin.
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