INDEX
- Alpha Centauri, 38, 42
- Andromeda, 70, 85
- Animalculæ, 165
- Atmospheres, planetary, 105
- Atoms and stars, 157
- Aurora Borealis, 175
- Bernoulli, 166
- Bessel, 100
- Bode, 188
- Champollion, hieroglyphics, 143
- Cherbourg, 97
- Communication, interplanetary,
- 141
- Earth currents, 135
- Eiffel Tower, 164
- Electrons, 137
- Fontenelle, 184
- Frauenhofer, 171
- Galileo, 101
- Giacobini, 97
- God, 174
- Gravitation, 105, 124
- Gruithuisen, 100
- Guzmann, prize, 153
- Habitability of planets, 170
- Harding, 101
- Hercules, 160, 162
- Homer, 95
- Huygens, 185
- Invisible universe, 175
- Jupiter, 23, 41, 123, 125, 187;
- (red spot), 126
- Juvisy Observatory, 107, 135,
- 138
- Kant, 182
- Kircher, 184
- Leibnitz, 166
- Life, conditions, of, 106
- Littrow, J. von, 141, 145
- Magnetic variations, 131
- Magnetic storms, 134
- Mars, 14,105, 111, 145, 187, 204;
- communication with, 117;
- flashes on, 111; polar snows,
- 113; rotation, 114
- Materialism, 173
- Mayer, 101
- Mercury, 185, 203
- Milky Way, 163, 170
- Molecules, 164
- Moon, 9, 41, 105, 116, 141, 201
- Neptune, 20, 35, 41, 219
- Nice Observatory, 97
- Pascal, 168
- Renan, 88
- Saturn, 18, 41, 189
- Scheiner, 181, 192, 195, 210, 215,
- 220
- Silicon, 210
- Sirius, 47
- Spectrum analysis, 127, 200
- Stars and atoms, 157
- Stars, speed of, 159
- Sunspots, 134, 135
- Temperature of planets, 127, 197
- Venus, 95, 204; rotation, 107
- Wavelengths of light, 171
THE END