Kordylevsk clouds

Lagrange points L4 and L5

The Kordylewskischen clouds (after Kazimierz Kordylewski ) are dust clouds in the Lagrange points L ₄ and L _{5 of} the system earth - moon . They should consist of gas and dust particles up to a size of several centimeters. The existence of the Kordylevsk clouds was confirmed in October 2018.

discovery

The Polish astronomer Kazimierz Kordylewski had visually observed very faint, foggy objects for the first time in 1956 , which - seen from the earth - had an angular extent of 2 ° and half the brightness of the light bridge between zodiacal light and counter- light . In 1961 he photographed the supposed clouds, which had obviously changed in size and shape in the meantime. In 1967 J. Wesley Simpson observed similar objects using the Kuiper Airborne Observatory . In 1975 the Orbiting Solar Observatory 6 space probe also detected foggy structures.

Further observations were reported in 2018.

When viewed from the earth, the clouds have an extension of 6 °.

See also

• 2010 TK7
• 2002 AA29
• Trojans (astronomy)

Web links

• K. Kordylewski: Photographic investigations of the libration point L5 in the earth-moon system. Acta Astronomica, Vol. 11 (1961), pp. 165-169 (article from May 2, 1961, digitized)
• Minutes of the 456th meeting of the Berlin Moon Watchers Group ( Memento from March 28, 2007 in the Internet Archive )
• Hypothetical planets. Text by Paul Schlyter (HTML version by Bill Arnett) in: Dienine8 planets A multimedia tour through the solar system: one star, eight planets and more . German translation (by Christoph Högl, Helmut Fritsch and Michael Wapp) of the English website The Nine Planets .

Individual evidence

1. ↑ Earth's dust cloud satellites confirmed. Retrieved November 9, 2018 . 
2. ↑ Judit Śliż-Balogh, András Barta, Gábor Horváth: Celestial mechanics and polarization optics of the Kordylewski dust cloud in the Earth-Moon Lagrange point L5 - I. Three-dimensional modeling of celestial mechanical dust cloud formation . In: Monthly Notices of the Royal Astronomical Society . tape 480 , no. 4 , September 1, 2018, ISSN  0035-8711 , p. 5550–5559 , doi : 10.1093 / mnras / sty2049 ( oup.com [accessed November 9, 2018]).
3. ↑ Judit Slíz-Balogh, András Barta, Gábor Horváth: Celestial mechanics and polarization optics of the Kordylewski dust cloud in the Earth – Moon Lagrange point L5 - Part II. Imaging polarimetric observation: new evidence for the existence of Kordylewski dust cloud . In: Monthly Notices of the Royal Astronomical Society . tape 482 , no. 1 , October 2, 2018, ISSN  0035-8711 , p. 762-770 , doi : 10.1093 / mnras / sty2630 ( oup.com [accessed November 9, 2018]).