astronomical refraction

astronomical refraction

[‚as·trə′näm·ə·kəl ri′frak·shən]
(geophysics)
The bending of a ray of celestial radiation as it passes through atmospheric layers of increasing density.
References in periodicals archive ?
He kept daily records of the weather and the tides, made regular magnetic observations, determined gravity from pendulum observations, studied astronomical refraction, measured the height of Table Mountain, and so on.

Full browser ?