F

F ring (Saturn), 224-225 Face on Mars, 348 Fahrenheit temperature scale, 191 fall, star visibility, 14 far side of the moon, 35 Fermi, Enrico, 248 field of view, 84 filters (colored), observing planets, 223 finderscopes, telescopes,

88, 97-98 fireballs, 186 first American in space, Alan B. Shephard, 137 first landing on moon, Apollo 11, 139 first law of motion,

Newton, 59 first man in space, 135 first man on moon, Armstrong, Neil A., 139 first quarter moon, 34, 153 first woman in space, Tereshkova, Valentina V., 138 fission, 248 flat universe, 374 flatness problem, Big Bang theory, 376-377 Fleming, Williamina, 261 flickering of quasars, 333 FM radio astronomy, 126 detecting meteor showers, 126

frequency, 109 wavelength, 109 focal length, lens, 70 foci, ellipses, 55 focus, telescopes, 70 forces in the universe, 376 formation of stars, 297 fragmentation, planetesi-

mals, 168 frequency, 68 AM radio, 109 FM radio, 109 light waves, 103 red light, 107 violet light, 107 wavelength proportionality, 106 full moon, 5, 10, 34 fusion, 248

Telescopes Mastery

Telescopes Mastery

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