Introduction: The gamut of light.--Other habitable worlds.--Other inhabited worlds.--The Rosse telescope set to new work.--The planet of love.--The planet of war.--A miniature sun.--Shooting stars, meteors, and aerolites.--Meteors and meteor systems.--Professor Tyndall's theory of comets.--Comets and comet's tails.--The sun's corona.--What, then is the corona?--The corona as a phenomenon of eruption.--Colours of the double stars
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