Hales, Stephen, 263
Half planes, 559
Halley, Edmund, 684
Harmony, in music, 496
Hawass, Zahi, 462
Height, inferring from femur, 205
Hipparchus of Rhodes, 497
Hooker Telescope, 661
Horizontal asymptotes, of a rational function, 387–388, 391–392
Horizontal ellipses, 678
Horizontal lines, equations of, 203
Hounsfield, Godfrey, 527
Hounsfield numbers, 534
Hubble, Edwin, 661
Hubble’s Law, 661
Humphries, Robert, 778