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Mars Orbiter
The following table is a list of Mars orbiters, consisting of space probes which were launched from Earth and are currently orbiting Mars. As of February 2021, there have been 18 spacecraft missions operating in Mars' orbit, 8 of which are currently active. In 2022, contact was lost to India's Mars Orbiter Mission. So with that loss, 7 orbiters remain active. History 20th century The Soviet Union, Soviets' Mars program and the United States's Mariner program became the two first successful space programs that intended to exploration of Mars, explore Mars through orbiters. Mars 2, Mars 3 and Mariner 9 were all launched into space in May 1971, and all entered Mars’ orbit that same year. NASA's Mariner 9 reached the planet's orbit first on November 14, narrowly beating the Soviet's spacecraft amid the space race, and subsequently became the first spacecraft to orbit another planet. Contact with all eight Mars orbiters launched during the 20th century has been lost. NASA's four ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
2001 Mars Odyssey Wizja
1 (one, unit, unity) is a number representing a single or the only entity. 1 is also a numerical digit and represents a single unit (measurement), unit of counting or measurement. For example, a line segment of ''unit length'' is a line segment of length 1. In conventions of sign where zero is considered neither positive nor negative, 1 is the first and smallest Positive number, positive integer. It is also sometimes considered the first of the sequence (mathematics), infinite sequence of natural numbers, followed by 2, although by other definitions 1 is the second natural number, following 0. The fundamental mathematical property of 1 is to be a multiplicative identity, meaning that any number multiplied by 1 equals the same number. Most if not all properties of 1 can be deduced from this. In advanced mathematics, a multiplicative identity is often denoted 1, even if it is not a number. 1 is by convention not considered a prime number; this was not universally ac ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
