Half-hours with the Telescope: Being a Popular Guide to the Use of the Telescope as a Means of Amusement and InstructionR. Hardwicke, 1868 - 109 páginas |
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Página 84
... seen much better in some oppositions than in others . When best seen the southern hemisphere is brought more into view than the northern , because the sum- mer of his northern hemisphere occurs when he is nearly in aphelion ( as is the ...
... seen much better in some oppositions than in others . When best seen the southern hemisphere is brought more into view than the northern , because the sum- mer of his northern hemisphere occurs when he is nearly in aphelion ( as is the ...
Página 85
... seen with very powers . moderate I add four sets of meridians ( Plate 6 ) , by filling in which from the charts the ... seen as a morning or evening star . Sometimes both are seen together on the twilight sky , and then Venus is ...
... seen with very powers . moderate I add four sets of meridians ( Plate 6 ) , by filling in which from the charts the ... seen as a morning or evening star . Sometimes both are seen together on the twilight sky , and then Venus is ...
Página 89
... seen , requires a much more powerful telescope than Jupiter . A good 2 - inch telescope will do much , however , in exhi- biting his rings and belts . I have never seen him satisfactorily myself with such an aperture , but Mr. Grover ...
... seen , requires a much more powerful telescope than Jupiter . A good 2 - inch telescope will do much , however , in exhi- biting his rings and belts . I have never seen him satisfactorily myself with such an aperture , but Mr. Grover ...
Contenido
CHAPTER | 1 |
CHAPTER II | 33 |
A HALFHOUR WITH LYRA HERCULES CORVUS CRATER ETC | 47 |
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Half-hours with the Telescope: Being a Popular Guide to the Use of the ... Richard A. Proctor Vista previa limitada - 2019 |
Términos y frases comunes
61 Cygni 70 Ophiuchi Albireo Algol Almanac alt-azimuth Andromeda aperture appears Arcturus astronomical axis blue Bootis brilliant Capella Cassiopeia Castor centre cluster colours companion components constellation convex lens Cor Caroli Cygni Cygnus dark Dawes diameter directed disc distance distinct vision double star easy double ecliptic equator exhibit eye-glass eye-piece eye-tube favourable field of view finder focal length focus formed glass HALF-HOUR heavens Herculis Herschel horizon hour Howlett Hydræ instrument Jupiter Jupiter's light look low power Lyra Lyræ magnitude maps Mars Mercury meridian method Milky Mizar moderate power moon motion naked eye nearly nebula noticed object object-glass Ophiuchi Orion pass Pegasi planet Pole-star Pollux powerful telescope quadrature region right ascension rings satellites Saturn Scorpionis screen seen Serpentis shadow shown in Plate Sirius solar spherical aberration spot sun's tele trapezium tube turn variable Vega visible wide double yellow zenith пр