Opik theory

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• Öpik, Ernest Julius — ▪ Estonian astronomer born Oct. 23, 1893, Port Kunda, Estonia, Russian Empire died November 1985       Estonian astronomer best known for his studies of meteors and meteorites, and whose life work was devoted to understanding the structure and… …   Universalium

• Ernst Öpik — Infobox Scientist name = PAGENAME box width = image size =150px caption = PAGENAME birth date = October 23, 1893 birth place = death date = September 10, 1985 death place = residence = citizenship = nationality = Estonian ethnicity = field =… …   Wikipedia

• Phobos (moon) — Phobos Enhanced color view of Phobos obtained by Mars Reconnaissance Orbiter on March 23, 2008. Stickney crater, the largest, is on the right side. Discovery Discovered by …   Wikipedia

• Entstehung des Mondes — Der Erdmond Die Entstehung des Mondes der Erde wird seit Jahrhunderten diskutiert. Seit Mitte der 1980er Jahre hat sich die Ansicht durchgesetzt, dass der Mond nach einem seitlichen Zusammenstoß der Proto Erde mit einem etwa marsgroßen Körper,… …   Deutsch Wikipedia

• History of Solar System formation and evolution hypotheses — Capture theory redirects here. For the solar capture theory, see this article s section on Solar System formation. For the lunar capture theory, see this article s section on lunar formation. Ideas concerning the origin and fate of the world date …   Wikipedia

• Galaxy — This article is about the astronomical structure. For other uses, see Galaxy (disambiguation). NGC 4414, a typical spiral galaxy in the constellation Coma Berenices, is about 55,000 light years in diameter and approximately 60 million light… …   Wikipedia

• White dwarf — For other uses, see White dwarf (disambiguation). Image of Sirius A and Sirius B taken by the Hubble Space Telescope. Sirius B, which is a white dwarf, can be seen as a faint pinprick of light to the lower left of the much brighter Sirius A …   Wikipedia

• comet — cometary /kom i ter ee/, cometic /keuh met ik/, cometical, adj. cometlike, adj. /kom it/, n. Astron. a celestial body moving about the sun, usually in a highly eccentric orbit, consisting of a central mass surrounded by an envelope of dust and… …   Universalium

• Giant-Impact-Theorie — Die Entstehung des Mondes der Erde wird seit Jahrhunderten diskutiert. Seit Mitte der 1980er Jahre hat sich die Ansicht durchgesetzt, dass der Mond nach einem seitlichen Zusammenstoß der Proto Erde mit einem etwa marsgroßen Körper, Theia genannt …   Deutsch Wikipedia

• Space debris — populations seen from outside geosynchronous orbit (GEO). Note the two primary debris fields, the ring of objects in GEO, and the cloud of objects in low earth orbit (LEO) …   Wikipedia

• Naine Blanche — Traduction terminée White dwarf → …   Wikipédia en Français