Norton S Star Atlas and Reference Handbook: 17th Ed

absolute magnitude altitude angle aperture apparent apparent magnitude Astronomical atmosphere axis bright Cassiopeia Catalogue celestial equator celestial sphere Centauri centre Cepheid co-ordinates colour comet constellation Cygni Declination diameter disk distance Earth ecliptic epoch equatorial Equinox eyepiece focal length Galactic galaxy globular hemisphere horizon hour circle inferior planet Jupiter latitude light Little change longitude luminosity lunar Lyræ Mare Mars mean meridian minor planets Mira type Moon naked eye Nebula Nova novæ observed open cluster orbit Orionis P.A. decreasing parallax parsecs planetary polar pole position proper motion R.A. Dec radiation Relatively fixed Right Ascension rotation period Sagittarii satellites Saturn seconds of arc seen Semi-regular sidereal Slow binary solar spectral Spectral Classification spectral type spectrum stellar Sun's sunspot surface TABLE telescope temperature transit type Mira type Ursa Majoris Variable Stars velocity Venus Virginis visible wavelength ΟΣ