Danish Hounds of Tycho Brahe, 172.
Day and Night, 46, 51.
Daylight, Stars seen in, 59.
Deimos and Phobos, Satellites of Mars, 200.
Deimos, Distance and Period of, 391.
Desertion, Herschel’s, 231.
Dewar, Professor, 53, 55, 187.
Dictionary, Worcester’s, Use of, 269.
Dione, Distance and Period of, 392.
Direction of Earth’s Axis Constant, 69.
Discoveries of Kepler, 174.
” ” Newton, 178.
Disguised Stars, 205.
Disposition of Comets’ Tails, 257.
Distance of the Sun, 17, 210, 391.
Distances of Heavenly Bodies, How measured, 19.
Distances of Nebulæ, 365.
” ” the Stars, 332.
Distant Objects, Apparent Smallness of, 25.
Double Stars, 342;
Motion of, 344.