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Percival Lowell ( / ˈloʊəl /; March 13, 1855 – November 12, 1916) was an American businessman, author, mathematician, and astronomer who fueled speculation that there were canals on Mars, and furthered theories of a ninth planet within the Solar System.
- American
Percival Lowell (Boston, 13 de março de 1855 — Flagstaff, 13 de novembro de 1916) foi um matemático, autor, empresário e astrónomo amador estadunidense que alimentou especulações de que existiam canais em Marte, fundou o Observatório Lowell em Flagstaff, Arizona, e formaram o início do esforço que levou à descoberta de ...
- Percival Lowell Mausoleum
Mars is the fourth planet from the Sun. The surface of Mars is orange-red because it is covered in iron(III) oxide dust, giving it the nickname "the Red Planet". Mars is among the brightest objects in Earth's sky and its high-contrast albedo features have made it a common subject for telescope viewing.
- 24.07 km/s, (86700 km/h; 53800 mph)
- 1.025957 d, 24ʰ 37ᵐ 22.7ˢ
- 241 m/s, (870 km/h; 540 mph)
Geological history of Mars - Wikipedia. HiRISE image illustrating Steno's law of superposition. The dark-toned lava flow overlies (is younger than) the light-toned terrain at right. The ejecta of the crater at centre overlies both units, indicating that the crater is younger than both units.
Mars - juin, Guerre de Crimée : négociation de Vienne, rompues par la Russie devant les exigences des alliés. 2 mars : début du règne d' Alexandre II , tsar de Russie (fin en 1881 ). Il entreprend un programme de réformes.
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Explication théorique & pratique de la loi du 23 mars 1855 mise en rapport avec la législation, la doctrine et le jurisprudence : précédée d'une introduction historique et des documents législatifs, suivie d'un Appendice sur les effets de la transcription de la revente....
Colonization of Mars - Wikipedia. Artist conception of astronauts working outside, near a large modular habitat. Colonization or settlement of Mars is the theoretical migration of humans to Mars and the establishment of long-term human presence on the planet.