Tours vs Mars

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Tours ( TOOR, French: [tuʁ] (listen)) is the prefecture of the Indre-et-Loire department and largest city in the Centre-Val de Loire region of Western France, although it is not the regional prefecture, which is the region's second-largest city, Orléans. In 2017, the commune of Tours had 135,787 inhabitants; the population of the whole metropolitan area was 495,379.Tours stands on the lower reaches of the Loire river, between Orléans and the Atlantic coast. Former Caesarodunum city of the Turones, founded by the Emperor Augustus, it possesses one of the largest amphitheaters of the Roman Empire. Known for the Battle of Tours (732), it is a National Sanctuary with Saint Martin, Gregory of Tours and Alcuin under the Merovingians and the Carolingians, with the adoption by the Capetians of the local currency the Livre tournois which became the currency of the kingdom. Capital of the county of Tours which became the Touraine, the garden of France. First city of the silk industry, wanted by Louis XI, royal capital under the Valois Kings with its Loire castles and city of art with the School of Tours.

Capital of loyalty during the French Wars of Religion and city of retreat in June 1940 which will lead it to be partly destroyed. The White and Blue city keeps nevertheless a historical center registered in the UNESCO and city of art and history with its Vieux-Tours, a remarkable patrimonial site. The garden city concentrates a green heritage and an urban landscape strongly influenced by its natural space. The historic city that is nicknamed "Le Petit Paris" and its region by its history and culture, has always been a land of birth or host to many personalities, international sporting events, university city with more than 30,000 students in 2019. Culinary city with its specialities : rillettes, rillons, Touraine vineyards, AOC Sainte-Maure-de-Touraine cheeses and nougats.The city is also the end-point of the annual Paris–Tours cycle race.

Source: Wikipedia

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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.

The Mars Express orbiter, the first European Space Agency (ESA) spacecraft to visit Mars, arrived in orbit on 25 December 2003. In January 2004, the Mars Exploration Rovers, named Spirit and Opportunity, both landed on Mars. Spirit operated until 22 March 2010 and Opportunity lasted until 10 June 2018. On 24 September 2014, the Indian Space Research Organisation (ISRO) became the fourth space agency to visit Mars when its maiden interplanetary mission, the Mars Orbiter Mission spacecraft, arrived in orbit.There are investigations assessing the past habitability of Mars, as well as the possibility of extant life. Astrobiology missions are planned, including the Perseverance and Rosalind Franklin rovers. Liquid water on the surface of Mars cannot exist due to low atmospheric pressure, which is less than 1% of the atmospheric pressure on Earth, except at the lowest elevations for short periods. The two polar ice caps appear to be made largely of water. The volume of water ice in the south polar ice cap, if melted, would be sufficient to cover the planetary surface to a depth of 11 metres (36 ft). In November 2016, NASA reported finding a large amount of underground ice in the Utopia Planitia region. The volume of water detected has been estimated to be equivalent to the volume of water in Lake Superior.Mars can easily be seen from Earth with the naked eye, as can its reddish coloring. Its apparent magnitude reaches −2.94, which is surpassed only by Venus, the Moon and the Sun. Optical ground-based telescopes are typically limited to resolving features about 300 kilometres (190 mi) across when Earth and Mars are closest because of Earth's atmosphere.

Source: Wikipedia