H

Hadrian's Wall, 359 Ha filter, 146, 281 Haggard, H. Rider, 101, 176 Haley, Bill, 161 Hall, Asaph, 202 Halley, Edmond on corona, 125, 139, 186 on distance to Sun, 289—290,

299, 300 on Earth's age, 106 on 1715 eclipse, 125, 139, 161172, 175-176, 217, 285 on predicting eclipses, 181 in Royal Society of London, 8990, 162, 166, 285 on saros, 89, 90-91, 92-93, 94, 161

on sunspots, 167, 169 on transits, 285 Hancock, John, 178 Hanukkah, 39 Happy Valley racecourse, 2 Hardy, Thomas, 380-381 Harrison, John, 92, 93, 289, 299 Harrison, William Henry, 192, 195 Harvard University, 176, 181, 184, 227, 232

Heliacal rising, 71, 72 Helios, 141

Helium, 5, 126, 127, 140, 141-143 Henry IV (Shakespeare), 147 Henry VIII, king of England, 368 Herge, 103, 176 Herodotus, 87, 88, 382 Herschel, Caroline, 262 Herschel, Sir John, 263, 321 Herschel, Sir William, 138, 262,

265-266, 269, 305, 321 Hesiod, 161

He Wishes for the Cloths of Heaven

(Yeats), 77 Hilda, Abbess, 357, 358, 374 Hindus, Hinduism, 26 Hipparchus, 80, 81, 86, 88, 397 Ho, 26, 403 Hollerith, Herman, 73 Hollis, Thomas, 177 Holy Roman Empire, 23 Hopkinson, Francis, 180 Hornsby, Thomas, 298 Horrocks, Jeremiah, 275, 277, 281 Hsi, 26, 403

Hubble Space Telescope, 123 Ceres from, 254

Earth's atmosphere and, 120, 250 orbit of, 301

Pluto-Charon from, 313, 315 Uranus from, 267, 268 Huber, Daniel, 323 Humphreys, Colin, 21, 22 Huns, 360 Hyades, 113

Hybrid eclipse, 432-433

Hydrogen coma and, 260 masers, 147 in stars, 125—126 in Sun, 5, 127, 130, 142, 143, 146, 160, 281

Ice Age, 154-155, 157-158, 394 Ida (asteroid), 320 Immersion, 282 Incarnation, 367

Inclination, 43, 402, 404, 413, 437 India, Indians, 16, 17, 86, 136 Indians, American, 175, 188. See also Native Americans; specific Indian tribes Industrial Revolution, 262 Ingress, 282, 283, 292, 295, 296 International Astronomical Union,

234 Internet, xiv Io, 303

Ionia, Ionians, 382 Ionosphere, 133 Ion(s), 144-145, 260, 437 Iran, Iranians, 393, 394 Ireland, Irish, 20, 361, 366, 372, 375, 378

Irving, Washington, 98, 177 Isandlwana, Battle of, 210-212 Ishtar, 28

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