ROYAL ASTRONOMICAL SOCIETY / SCIENCE PHOTO LIBRARY ROYAL ASTRONOMICAL SOCIETY / SCIENCE PHOTO LIBRARY
Zodiacal light diagram. This celestial phenomenon is a faint white glow seen extending from the Sun along the plane of the ecliptic, the plane within which the planets orbit. Zodiacal light is caused by sunlight reflecting of dust particles in the ecliptic plane. This diagram shows what is seen on the horizon from Paris, France, towards the end of the month of February. Several stars and constellations are labelled in the sky. Published in Traite Physique et Historique de l'Aurore Boreale (1754) by the French geophysicist Jean-Jacques d'Ortous de Mairan (1678-1771).
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