Atmospheric refraction
Astronomical refraction
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==Astronomical refraction== |
==Astronomical refraction== |
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[[File:Mannheim Sonnenuntergang.webm|thumb|right|300px|Time-lapse |
[[File:Mannheim Sonnenuntergang.webm|thumb|right|300px|Time-lapse of a sunset demonstrating **astronomical refraction** in its extreme form near the horizon, causing elliptical flattening. **Atmospheric dispersion** is also visible as chromatic fringing at the solar limb.]] |
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'''Astronomical refraction''' deals with the angular position of celestial bodies, their appearance as a point source, and through differential refraction, the shape of extended bodies such as the Sun and Moon.{{Citation |last=Bomford |first=Guy |title=Geodesy |title-link=Geodesy (book) |pages=282–284 |year=1980 |edition=4 |place=Oxford |publisher=Oxford University Press |isbn=978-0-19-851946-1 |author-link=Guy Bomford}} |
'''Astronomical refraction''' deals with the angular position of celestial bodies, their appearance as a point source, and through differential refraction, the shape of extended bodies such as the Sun and Moon.{{Citation |last=Bomford |first=Guy |title=Geodesy |title-link=Geodesy (book) |pages=282–284 |year=1980 |edition=4 |place=Oxford |publisher=Oxford University Press |isbn=978-0-19-851946-1 |author-link=Guy Bomford}} |
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