L

Lady magazine, 328 Lambert, Charles, 338 Langley, Samuel Pierpont, 201 LASCO (Large Angle Spectroscopic

Coronagraph), 133 Laser ranging, ix, 70, 150, 157 Lassell, William, 269-270 Latitude atmospheric dust and, 64 celestial, 421 chords and, 283 day length and, 89 deduction of, 91 definition of, 436 Earth's distance to Sun and, 296, 297

ecliptic plane and, 43, 398-399 geographical, 49 Moon and, 64, 69 parallax and, 291, 292 saronic cycle and, 227 Universal Time and, 352

Lauliwasikau, 189-190. See also

Tenskwatawa Lawrence of Arabia, 175 Leap year(s), xii-xiii in anomalistic year, 395-396 Catholic Church on, 407 century year and, 364 in Egypt, 78 equinoxes and, 392 in Gregorian calendar, 393-394 in Julian calendar, 88-89, 367 Metonic cycle and, 406 month's duration in, 389 octaeteris and, 366 saronic cycle and, 46, 393, 411 in Western calendar, 18, 386-387 Leo, 245, 264, 266 Leonid meteor shower, xii, 3 Leopold, Prince, 58 Lescarbault, Edmond Modeste, 306 LeVerrier, Urbain, 269, 304-307,

308, 312, 317 Life and Voyages of Christopher Columbus (Irving), 177 Light. See also spectrum; starlight, stars behavior of, 248-252 gravitation and, x light-curve, 438 Moon's color and, 61 photons of, 128-129 refraction of, 55, 62, 111, 266 Lines bright, 140-141, 142 coronium, 145 emission, 140-141

hydrogen, 146 nodal, 404 Little Ice Age, 169 Livy, 17

Lockyer, Sir Norman, 143, 144,

202-203 Longitude, 95-96

415, 420, 421, 424 Columbus on, 98 definition of, 436 Earth's distance to Sun and, 295,

296, 297 ecliptic plane and, 43 geographical, 49, 286 Harrison and, 289 Moon's orbit and, 69 nodal, 273, 414, 428 parallax and, 291, 292 of partial solar eclipse, 429 problem of, 91-93 transits and, 280, 298, 299 Universal Time and, 352 Loom, Jacquard, 73, 74 Loops, coronal, 51 Louis (son of Charlemagne), 24 Lowell, Percival, 264, 309, 311, 319,

325-326 Lowell Observatory, 257, 309, 311 Luke, gospel of, vii Lunar eclipse(s), 4-5, 43, 54-59,

424-429. See also total lunar eclipse(s) of 413 B.C., 23 of 331 B.C., 18, 381 of 168 B.C., 17, 18, 35

of A.D. 33, 22, 23 of807-810, 24 of 1453, 174 of 1769, 298

after Crucifixion, 21-22, 23 Battle of Pydna and, 17, 35 definition of, 47 duration of, 59-60 Earth's shape and, 30 ecliptic limits of, 418 frequency of, 54, 430 full moon and, 7, 28, 84, 409 Hardy on, 380-381 horizontal, 55, 57-59 longitude and, 95-96 in Nantucket, 239 navigation and, 91-93 observation of, 288 occultation and, 272 at opposition, 401, 402, 405, 418 orbits and, 273 predictions of, 65-66 stock market and, 226 of2002 to 2022, 339-340, 341,

351-355 total number of, 432 in twentieth century, 75, 77 Lunation, 42, 440 Luther, Martin, 368 Lydia, Lydians, 87, 382

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