Astronomy and Astro-physics, Volumen13

absorption line angle appear ASTRONOMY AND ASTRO-PHYSICS atmosphere axis bands body bright lines carbon catalogue chromosphere comet corona curve dark lines Decl determined diameter disc displacement distance double stars E. E. BARNARD eclipse equator equatorial error exposure faculæ faint Harvard College Observatory Hẞ Huggins hydrogen lines inches instrument intensity July June Jupiter latitude Lick Observatory light limb Lyræ magnitude Mars maximum means measures method micrometer Moon motion nearly nebula nebular lines Nova object observations Observatory obtained orbit Orion nebula parallax period phenomena photographs photosphere Pickering planet plate polar position prism probably Professor prominences proper motion region right ascension rotation S. W. Burnham satellite screw seen Sept slit solar spectra spectroheliograph spectroscope spots stellar surface telescope temperature tion vapor variable stars velocity visible visual Vogel wave-lengths Wolf-Rayet stars