Page 393 - 89 history of astronomy_opt

to the sun is 92,780,000 miles. There seems,
however, to be some uncertainty about the
true value of the aberration, any determi-
nation of which is subject to irregularities
due to the ”seasonal errors.” The velocity
of light was experimentally found, in 1862,
by Fizeau and Foucault, each using an inde-
pendent method. These methods have been
developed, and new values found, by Cornu,
393