A Text-Book of Astronomy

Name: A Text-Book of Astronomy
Author: Comstock, George C. (George Cary)

Comstock, George C. (George Cary)

Astronomy

Rotation, of earth, 55.
    of Mars, 151.
    of moon, 99.
    of Jupiter, 138.
    of Saturn, 144.
    of sun, 120, 132.


  Saros, 72.

  Satellites, of Jupiter, 136, 140.
    of Mars, 155.
    of Saturn, 145.

  Saturn, 142.
    ball of, 144.
    orbit, 29.
    rings, 142.
    rotation, 144.
    satellites, 145.

  Seasons, on the earth, 47.
    on Mars, 151.

  Shadow cone, 64, 66.

  Sidereal time, 20, 54.

  Shooting stars, 158. (See Meteor.)

  Spectroscope, 84.

  Spectroscopic binaries, 203.

  Spectrum, 84, 87.
    of comets, 182.
    of nebulæ, 216.
    of stars, 211.
    types of, 88.

  Spectrum analysis, 85.

  Spiral nebulæ, 215.

  Standard time, 57.

  Stars, 8, 184.
    classes of, 212.
    clusters, 213.
    colors, 209.
    dark stars, 201.
    development of, 242.
    distances from the sun, 188, 196.
    distribution of, 220.
    double stars, 198, 203.
    drift, 194.
    magnitudes, 9, 196.
    number of, 185.
    spectra, 211.
    temporary, 208.
    variable, 204.

  Starlight, absorption of, 225.

  Star maps, construction of, 23.

  Stellar system, extent of, 223.

  Sun's apparent motion, 25.
    real motion, 195.

  Sun, 110.
    chemical composition, 116.
    chromosphere, 124.
    corona, 123.
    distance from the earth, 111.
    faculæ, 119, 122.
    gaseous constitution, 127.
    heat of, 117.
    mechanism of, 126.
    physical properties, 115-120.
    prominences, 125.
    rotation, 120, 132.
    surface of, 119.
    temperature, 118.

  Sun spots, 119, 121.
    period, 129, 131.
    zones, 130.


  Telescopes, 78.
    equatorial mounting for, 80.
    magnifying power of, 79.

  Temperature of Jupiter, 139.
    of Mars, 152.
    of Mercury, 149.
    of moon, 107.
    of sun, 118.

  Temporary stars, 208.

  Terminator, 91.

  Tenth meter, 75.

  Tidal friction, 233-238.

  Tides, 42.

  Time, sidereal, 20, 54.
    solar, 52.
    determination of, 20.
    equation of, 53.
    standard, 57.

  Triangulation, 3.

  Trifid nebula, 215.

  Twilight, 51.

  Twinkling, of stars, 48.


  Universe, development of, 226.
    stability of, 247.

  Uranus, 146.


  Variable stars, 204.

  Velocity, its relation to orbital motion, 38.

  Venus, 148.
    orbit of, 30.

  Vernal equinox, 21, 25.

  Vertical circle, 21.


  Wave front, 76.

  Wave lengths, 75, 86.


  Year, 25.
    leap year, 61.
    sidereal year, 59.
    tropical year, 60.


  Zenith, 21.

  Zodiac, 26.

  Zodiacal light, 168.




THE END




[Illustration: PROTRACTOR TO ACCOMPANY COMSTOCK'S ASTRONOMY]





End of Project Gutenberg's A Text-Book of Astronomy, by George C. Comstock

Public-domain text, read in full here on John Shaqi.

Opening the text

A Text-Book of AstronomyComstock, George C. (George Cary)

Science

A Text-Book of Astronomy

Comstock, George C. (George Cary)

Astronomy

Rotation, of earth, 55.
    of Mars, 151.
    of moon, 99.
    of Jupiter, 138.
    of Saturn, 144.
    of sun, 120, 132.


  Saros, 72.

  Satellites, of Jupiter, 136, 140.
    of Mars, 155.
    of Saturn, 145.

  Saturn, 142.
    ball of, 144.
    orbit, 29.
    rings, 142.
    rotation, 144.
    satellites, 145.

  Seasons, on the earth, 47.
    on Mars, 151.

  Shadow cone, 64, 66.

  Sidereal time, 20, 54.

  Shooting stars, 158. (See Meteor.)

  Spectroscope, 84.

  Spectroscopic binaries, 203.

  Spectrum, 84, 87.
    of comets, 182.
    of nebulæ, 216.
    of stars, 211.
    types of, 88.

  Spectrum analysis, 85.

  Spiral nebulæ, 215.

  Standard time, 57.

  Stars, 8, 184.
    classes of, 212.
    clusters, 213.
    colors, 209.
    dark stars, 201.
    development of, 242.
    distances from the sun, 188, 196.
    distribution of, 220.
    double stars, 198, 203.
    drift, 194.
    magnitudes, 9, 196.
    number of, 185.
    spectra, 211.
    temporary, 208.
    variable, 204.

  Starlight, absorption of, 225.

  Star maps, construction of, 23.

  Stellar system, extent of, 223.

  Sun's apparent motion, 25.
    real motion, 195.

  Sun, 110.
    chemical composition, 116.
    chromosphere, 124.
    corona, 123.
    distance from the earth, 111.
    faculæ, 119, 122.
    gaseous constitution, 127.
    heat of, 117.
    mechanism of, 126.
    physical properties, 115-120.
    prominences, 125.
    rotation, 120, 132.
    surface of, 119.
    temperature, 118.

  Sun spots, 119, 121.
    period, 129, 131.
    zones, 130.


  Telescopes, 78.
    equatorial mounting for, 80.
    magnifying power of, 79.

  Temperature of Jupiter, 139.
    of Mars, 152.
    of Mercury, 149.
    of moon, 107.
    of sun, 118.

  Temporary stars, 208.

  Terminator, 91.

  Tenth meter, 75.

  Tidal friction, 233-238.

  Tides, 42.

  Time, sidereal, 20, 54.
    solar, 52.
    determination of, 20.
    equation of, 53.
    standard, 57.

  Triangulation, 3.

  Trifid nebula, 215.

  Twilight, 51.

  Twinkling, of stars, 48.


  Universe, development of, 226.
    stability of, 247.

  Uranus, 146.


  Variable stars, 204.

  Velocity, its relation to orbital motion, 38.

  Venus, 148.
    orbit of, 30.

  Vernal equinox, 21, 25.

  Vertical circle, 21.


  Wave front, 76.

  Wave lengths, 75, 86.


  Year, 25.
    leap year, 61.
    sidereal year, 59.
    tropical year, 60.


  Zenith, 21.

  Zodiac, 26.

  Zodiacal light, 168.




THE END




[Illustration: PROTRACTOR TO ACCOMPANY COMSTOCK'S ASTRONOMY]





End of Project Gutenberg's A Text-Book of Astronomy, by George C. Comstock

Public-domain text, read in full here on John Shaqi.

A Text-Book of Astronomy

A Text-Book of Astronomy

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