انحراف الضوء

انحراف الضوء Aberration of light أوثابت الزيغ مصطلح يشير الى الزيغ الأكبر لنجم مرصود من سطح الكرة الأرضية ويعادل 20,49 ثانية من ثوانى القوس .

شرح

Figure 1. Diagram illustrating stellar aberration

أنواع الانحراف

Figure 2: As light propagates down the telescope, the telescope moves requiring a tilt to the telescope that depends on the speed of light. The apparent angle of the star φ differs from its true angle θ

Figure 3: Bradley's data on the north-south component of the aberration of γ-Draconis in 1727 establishing stellar aberration.

Figure 4. Diagram illustrating the effect of annual aberration on the apparent position of three stars at ecliptic longitude 270 degrees, and ecliptic latitude 90, 45 and 0 degrees, respectively

الخلفية التاريخية

المصادر

مؤمن, عبد الأمير (2006). قاموس دار الفهم الفلكي. بيروت، لبنان: دار الفهم للملايين.

P. Kenneth Seidelmann (Ed.), Explanatory Supplement to the Astronomical Almanac (University Science Books, 1992), 127-135, 700.
Simon Newcomb, A Compendium of Spherical Astronomy (Macmillan, 1906 - republished by Dover, 1960), 160-172.
Arthur Berry, A Short History of Astronomy (John Murray, 1898 - republished by Dover, 1961), 258-265.
S. Rigaud, Memoirs of Bradley (1832)
Charles Hutton, Mathematical and Philosophical Dictionary (1795).
H. H. Turner, Astronomical Discovery (1904).