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Mars is the fourth planet from the Sun and the second-smallest planet in the Solar System, being larger than only Mercury. In English, Mars carries the name of the Roman god of war and is often referred to as the "Red Planet". The latter refers to the effect of the iron oxide prevalent on Mars's surface, which gives it a reddish appearance distinctive among the astronomical bodies visible to the naked eye. Mars is a terrestrial planet with a thin atmosphere, with surface features reminiscent of the impact craters of the Moon and the valleys, deserts and polar ice caps of Earth.
The days and seasons are comparable to those of Earth, because the rotational period as well as the tilt of the rotational axis relative to the ecliptic plane are similar. Mars is the site of Olympus Mons, the largest volcano and highest known mountain on any planet in the Solar System, and of Valles Marineris, one of the largest canyons in the Solar System. The smooth Borealis basin in the northern hemisphere covers 40% of the planet and may be a giant impact feature. Mars has two moons, Phobos and Deimos, which are small and irregularly shaped. These may be captured asteroids, similar to 5261 Eureka, a Mars trojan.Mars has been explored by several uncrewed spacecraft. Mariner 4 was the first spacecraft to visit Mars; launched by NASA on 28 November 1964, it made its closest approach to the planet on 15 July 1965. Mariner 4 detected the weak Martian radiation belt, measured at about 0.1% that of Earth, and captured the first images of another planet from deep space. The Soviet Mars 3 mission included a lander, which achieved a soft landing in December 1971; however, contact was lost seconds after touchdown. On 20 July 1976, Viking 1 performed the first successful landing on the Martian surface. On 4 July 1997, the Mars Pathfinder spacecraft landed on Mars and on 5 July released its rover, Sojourner, the first robotic rover to operate on Mars.
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Orléans (UK: ; US: , French: [ɔʁleɑ̃] (listen)) is a prefecture and commune in north-central France, about 120 kilometres (74 miles) southwest of Paris. It is the capital of the Loiret department and of the Centre-Val de Loire region.
Orléans is located on the Loire River nestled in the heart of the Loire Valley, classified as a World Heritage Site, where the river curves south towards the Massif Central. In 2017, the city had 116,685 inhabitants within its municipal boundaries. Orléans is the center of Orléans Métropole that has a population of 286,257, the 20th largest in France. The larger metropolitan area has a population of 444,681.
The city owes its development from antiquity to the commercial exchanges resulting from the river. An important river trade port, it was the headquarters of the community of merchants frequenting the Loire River.
Salisbury (locally SAWZ-bər-ee) is a cathedral city in Wiltshire, England, with a population of...
Fuefuki (笛吹市, Fuefuki-shi) is a city in Yamanashi Prefecture, Japan. As of 31 March 2019, the...
Warsaw (Polish: Warszawa [varˈʂa.va] (listen)), officially the Capital City of Warsaw, is the...