Manual of astronomyLippincott, 1853 - 331 páginas |
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Página 121
John Drew. SECTION XIII . SIDEREAL ASTRONOMY . NEW STARS - VARIABLE STARS - DOUBLE STARS - COLOURED STARS- TRIPLE AND MULTIPLE STARS - THE MILKY WAY - GROUPS AND CLUSTERS OF STARS - DIFFERENT CLASSES OF NEBULE . 140. THE bodies composing ...
John Drew. SECTION XIII . SIDEREAL ASTRONOMY . NEW STARS - VARIABLE STARS - DOUBLE STARS - COLOURED STARS- TRIPLE AND MULTIPLE STARS - THE MILKY WAY - GROUPS AND CLUSTERS OF STARS - DIFFERENT CLASSES OF NEBULE . 140. THE bodies composing ...
Página 129
John Drew. star Cancri is a triple star , which , under favourable circumstances , may be seen with a good telescope ... stars , each pair revolving apparently round the centre of gra- vity of the two , and both pairs revolving round the ...
John Drew. star Cancri is a triple star , which , under favourable circumstances , may be seen with a good telescope ... stars , each pair revolving apparently round the centre of gra- vity of the two , and both pairs revolving round the ...
Página 209
... stars are of the first magnitude : after the sixth magnitude they are termed telescopic stars . Sir John Herschel estimates the light of the first six magnitudes to be in the proportions of 100 , 25 , 12 , 6 , 2 , 1. On maps of the ...
... stars are of the first magnitude : after the sixth magnitude they are termed telescopic stars . Sir John Herschel estimates the light of the first six magnitudes to be in the proportions of 100 , 25 , 12 , 6 , 2 , 1. On maps of the ...
Contenido
PART | 1 |
The Earth of a globular formDetermination | 18 |
The Seasons | 47 |
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Términos y frases comunes
achromatic altitude angle appear ascer astronomers atmosphere attraction axis azimuth calculated celestial globe centre of gravity circle collimation comet correct declination density describe determine diameter difference direction disc diurnal double stars earth earth's orbit east eclipse equal equator equatorial equinoctial error fixed stars force Greenwich heavenly body heavens Herschel horizon hour-angle hour-circle inches inclination inferior planet instrument Jupiter latitude length light longitude Mars mean measured Mercury meridian miles minutes moon moon's motion Nautical Almanac nebula nodes object object-glass observation Observatory parallax pass pendulum perihelion perpendicular planet planetary Plate point of Aries polar distance pole portion position proportion rays refraction revolution revolve round right ascension round the sun satellites Saturn seconds seen shadow shew shewn side sidereal sidereal day space sphere spherical sun's suppose surface telescope tion transit transit circle Uranus Venus vertical vibration wire