Saturn, orbit of, 180.
Savelle, Thomas, T. sends letter to, 182.
Scaliger, Joseph, T. corresponds with, 255, 266, 270.
Schjellerup, orbit of comet 1580, 161.
Schönfeld, Victor, professor at Marburg, 127.
Schreckenfuchs, 82.
Schuler, Wolfgang, professor at Wittenberg, on new star, 58, 83.
Scripture and Copernican system, 177.
Scultetus, studies at Leipzig, 16; teaches T. about transversals, 20, 330; corresponds with T., 131, 133; on comet, 1577, 171; T. sends him a book, 182; T. consults him about printing, 288, 369.
Seccerwitz, poet, visits T., 136.
Seiffart, assistant to T., 302.
Sextant, 32, 38, 159, 325, 326.
Sights, improved, 331.
Sjöborg, Swedish antiquarian, 91, 378.
Snellius, 371.
Sörensen, king's physician, enemy of T., 232.
Soliman, Sultan, death foretold by T., 26.
Sophia, Queen, 138, 198, 200.
Stadius, ephemerides, 14, 17.
Stags, 210.
Star in Cassiopea. See New star.
Stars, fixed, observations of, 164, 351, 353; catalogue of, 227, 265, 347, 352, 353.
Stenwinchel, architect, 93, 101.
Stjerneborg, description, 103; ruins of, 378.
Stub, Professor, sent to Hveen, 240.
Sun, observations of, 94, 333; orbit of, 333, 346.
System of the world. See Copernicus, Ptolemy, Reymers, Tycho.
Tabit ben Korra on trepidation, 354, 355.
Tampach, publisher of T.'s books, 369, 370
Tenants at Hveen, 116, 235, 267; on the estate of the Roskilde prebend, 217.
Tengnagel, assistant to T, 242, 367; sent to Holland, 269; brings letter to Kepler, 293; Kepler's wife complains of him, 300; marries T.'s daughter, 301, 302; intends to prepare planetary tables, 365; gives it up, 312; subsequent career, 367; edits T.'s book on comet, 369; agreement with Kepler about MSS., 370.
Teynkirche at Prague, T. buried there, 310.
Thau, Valentin, mathematician, 16.
Theatrum astronomicum, proposed work by T., 182, 370.
Theon, first mention of trepidation, 354.
Thott, Otto, brother-in-law of T., 201; Tage, nephew, 201.
Time determinations, 159, 258, 322.
Timocharis used armillæ, 315.
Tomb of T., 311.
Torquetum, instrument not used by T, 317.
Traditions about Hveen, 92.
Transversal divisions, 20, 330.
Trautson, Emperor's chamberlain, 279.
Trepidation, 262, 354, 355.
Trigoni, astrological term, 49, 195.
Trigonometry, development of, 4, 360, 361.
Triquetrum, 58, 83, 84; not much used by T., 322.
Twilight, duration of, 206.
Tychonic system, 167, 180, 303
Ulfstand, Governor to Prince Christian, 215.
Ulrich, Prince, recovers great globe, 366.
Uraniborg, description, 93; life at, 114; ruins of, 377, 378.
Ursus. See Reymers.
Valeesius on new star, 60, 64.