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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 ". [21] [22] 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.
- Life on Mars
The possibility of life on Mars is a subject of interest in...
- Moons of Mars
History Early speculation Curiosity's view of the Martian...
- Mars (Mythology)
In ancient Roman religion and mythology, Mars (Latin: Mārs,...
- Human Mission to Mars
Travel to Mars The minimum distance between the orbits of...
- Flag of Mars
Proposed flags Thomas O. Paine's design A flag design...
- History of Mars Observation
The history of Mars observation is about the recorded...
- Phobos (Moon)
Phobos (/ ˈ f oʊ b ə s /; systematic designation: Mars I) is...
- Emirates Mars Mission
The Emirates Mars Mission (Arabic: مشروع الإمارات لاستكشاف...
- Marsquake
Illustration of the shadow zone of a P-wave for Earth....
- Life on Mars
The geological history of Mars follows the physical evolution of Mars as substantiated by observations, indirect and direct measurements, and various inference techniques.
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15 mars, France : nouvelle préface de Victor Hugo pour le roman Le Dernier Jour d'un condamné. 16 mars, France : à Troyes, Claude Gueux est condamné à mort. 21 mars, France : loi sur le recrutement militaire et la formation de l'armée. La loi Soult impose un service militaire de sept années.
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Mars is the site of Olympus Mons, the second highest known mountain within the Solar System (the tallest on a planet), and of Valles Marineris, one of the largest canyons. The smooth Borealis basin in the northern hemisphere covers 40% of the planet and may be a giant impact feature. Mars has two known moons, Phobos and Deimos, which are small ...
Early Times The first sightings of Mars. 1500s How far away is Mars? 1600s The telescope helps us see Mars. 1700s Does Mars have ice caps? Is Mars inhabited? 1800s The canal craze begins.
1840. Wilhelm Beer (1797 - 1850) and Johann von Maedler (1794 - 1874) observe Mars over periods of 759, 1604, and 2234 days, and determine that the rotational period of Mars is 24 hours, 37 minutes, 22.6 seconds, which is surprisingly close to the currently accepted value of 24 hours, 37 minutes, 22.7 seconds. 1854.
