George Biddell Airy
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Sir George Biddell Airy was an English mathematician and astronomer, as well as the Lucasian Professor of Mathematics from 1826 to 1828 and the seventh Astronomer Royal from 1835 to 1881. His many ach
George Biddell Airy in 1891
George Biddell Airy
Airy's Transit Circle in the Transit Circle Room of the Royal Greenwich Observatory; for a hundred years from 1884 to 1984, it marked the Prime meridian of the world, or more accurately, the Prime Meridian was marked by or derived from it.
The Prime Meridian in Greenwich (1884–1984); the telescope shown above left is behind the glass
Aberration (astronomy)
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In astronomy, aberration is a phenomenon where celestial objects exhibit an apparent motion about their true positions based on the velocity of the observer: It causes objects to appear to be displace
Bradley's observations of Eltanin (γ Draconis) and 35 Camelopardalis as reduced by Busch to the year 1730
Hypothetical observation of Eltanin if its movement was caused by parallax
Hypothetical observation of γ Draconis and 35 Camelopardalis if their movements were caused by nutation
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.