Mars vs Khartoum

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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

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Khartoum or Khartum ( kar-TOOM; Arabic: الخرطوم‎, romanized: Al-Khurṭūm) is the capital of Sudan. With a population of 5,274,321, its metropolitan area is the largest in Sudan. Khartoum is located at the confluence of the White Nile, flowing north from Lake Victoria, and the Blue Nile, flowing west from Lake Tana in Ethiopia. The location where the two Niles meet is known as al-Mogran or al-Muqran (المقرن; English: "The Confluence"). From there, the Nile continues to flow north towards Egypt and the Mediterranean Sea. Divided by these two parts of the Nile, Khartoum is a tripartite metropolis with an estimated overall population of over five million people, consisting of Khartoum proper, and linked by bridges to Khartoum North (الخرطوم بحري al-Kharṭūm Baḥrī) and Omdurman (أم درمان Umm Durmān) to the west. Khartoum was founded in 1821 as part of Ottoman Egypt, north of the ancient city of Soba. The Siege of Khartoum in 1884 led to the capture of the city by Mahdist forces and a massacre of the defending Anglo-Egyptian garrison.

It was reoccupied by British forces in 1898 and served as the seat of the Anglo-Egyptian Sudan government until 1956, when the city became the capital of an independent Sudan. The city has continued to experience unrest in modern times. Three hostages were killed during the Attack on the Saudi Embassy in Khartoum in 1973. The Justice and Equality Movement engaged in combat with Sudanese government forces in the city in 2008 as part of the War in Darfur. The Khartoum massacre occurred in 2019 amongst the Sudanese Revolution. Khartoum is an economic and trade centre in Northern Africa, with rail lines from Port Sudan and El-Obeid. It is served by Khartoum International Airport, with another airport, Khartoum New International Airport, under construction. Several national and cultural institutions are located in Khartoum and its metropolitan area, including the National Museum of Sudan, the Khalifa House Museum, the University of Khartoum, and the Sudan University of Science and Technology.

Source: Wikipedia