Astronomy and Astro-physics, Volumen12

angle aperture appear asteroids ASTRONOMY AND ASTRO-PHYSICS axis bands bodies bright lines Burnham Catalogue chromosphere collimator comet computed corona curve dark lines Decl determined diameter direction disc distance double stars E. E. Barnard Earth eclipse ephemeris equation equatorial error exposure faculæ faint Fe Fe Fe focal give Goodsell Observatory grating Harvard College Observatory hydrogen lines inches instrument July June Jupiter Lick Observatory light magnetic magnitude matter maximum mean measures meteors method micrometer Moon nearly nebula nebular line Nova nucleus object observations obtained orbit paper period planet position prism probably Professor prominences proper motions refraction refractor rotation S. W. Burnham satellite Saturn seen Sirian slit solar solar prominences spectra spectroheliograph spectroscope spectrum spots stellar Sun's surface telescope temperature theory tion tube variable stars velocity visible wave-lengths