The Sun: Ruler, Fire, Light, and Life of the Planetary System

angle appearance astronomers atmospheric glare aurora body bright lines centre chromatosphere clouds consider consideration corona corresponding dark lines deduced determine diameter direction Earth estimate evidence fact faculæ favourable Halley's method heat height Herschel hydrogen inferior conjunction ingress less Lockyer luminous Mars mass matter mean distance meteoric meteoric systems miles per second minutes Moon Moon's disc Moon's limb motion noticed observations orbit parallax pass path peculiarity penumbra perihelion phenomena phenomenon photographs photosphere planets Plate polariscopic portion present prism problem protuberances rays recognised regarded region remarkable researches respecting rotation Secchi seems seen shown slit solar appendage solar atmosphere solar parallax solar physics solar prominences solar spectrum solar system space spectra spectroscope stars stations Sun-spots Sun's disc Sun's distance Sun's limb Sun's surface supposed telescope terrestrial theory tion total eclipse transit transits of Venus vapours velocity Venus visible zodiacal light