Definition
The zodiacal light is a faint veil of light covering the Earth’s sky. Brighter towards the Sun and the ecliptic, it originates in solar light scattered by a cloud of dust particles, mostly of cometary and asteroidal origin. The increase of brightness, toward the Sun and the near-ecliptic region, indicates an increase in the space density of the interplanetary dust cloud, which has a lenticular shape around the Sun; a slight brightness enhancement toward the antisolar region (gegenschein) corresponds to a backscattering effect. Thermal emission from the zodiacal particles forms, away from the galactic plane, the most prominent component in the near-infrared sky.
History
Although some hints are suspected in ancient texts, Childrey (1661) possibly gave the first description of the zodiacal light. Cassini (1683) provided a detailed interpretation, with the zodiacal light originating in a flattened cloud that scatters better the light when the line of sight gets closer to the...
References and Further Reading
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Cassini JD (1683) Découverte de la lumière qui paroist dans le zodiaque. Acad roy des sci, Paris
Childrey J (1661) Britannia Baconica or the natural rarities of England, Scotland and Whales (London)
Dermott SF, Grogan K, Durda DD, Jayaraman S, Kehoe TJJ, Kortenkamp SJ, Wyatt MC (2001) Orbital evolution of interplanetary dust. In: Grün E, Gustafson BAS, Dermott SF, Fechtig H (eds) Interplanetary dust. Springer, Berlin, pp 569–639
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Levasseur-Regourd AC, Renard JB, Dumont R (1991) The zodiacal cloud complex. In: Levasseur-Regourd AC, Hasegawa H (eds) IAU Coll. on origin and evolution of interplanetary dust. Kluwer, Dordrecht, pp 131–138
Levasseur-Regourd AC, Mann I, Dumont R, Hanner MS (2001) Optical and thermal properties of interplanetary dust. In: Grün E, Gustafson BAS, Dermott SF, Fechtig H (eds) Interplanetary dust. Springer, Berlin, pp 57–94
Levasseur-Regourd AC, Lasue J, Desvoivres E (2006) Early inner solar system impactors: physical properties of comet nuclei and dust particles revisited. Orig Life Evol Biosph 36:507–514
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Levasseur-Regourd, AC. (2014). Zodiacal Light. In: Amils, R., et al. Encyclopedia of Astrobiology. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-27833-4_1706-2
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DOI: https://doi.org/10.1007/978-3-642-27833-4_1706-2
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Zodiacal Light- Published:
- 07 April 2023
DOI: https://doi.org/10.1007/978-3-642-27833-4_1706-3
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Zodiacal Light- Published:
- 30 April 2015
DOI: https://doi.org/10.1007/978-3-642-27833-4_1706-2