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Since the late 20th century, Mars has been explored by uncrewed spacecraft and rovers, with the first flyby by the Mariner 4 probe in 1965, the first Mars orbiter by the Mars 2 probe in 1971, and the first landing by the Viking 1 probe in 1976.
- 24.07 km/s, (86700 km/h; 53800 mph)
- 1.025957 d, 24ʰ 37ᵐ 22.7ˢ
- 241 m/s, (870 km/h; 540 mph)
Mars is one of the most explored bodies in our solar system, and it's the only planet where we've sent rovers to roam the alien landscape. NASA missions have found lots of evidence that Mars was much wetter and warmer, with a thicker atmosphere, billions of years ago.
3 giorni fa · Mars is designated by the symbol ♂. Sometimes called the Red Planet, Mars has long been associated with warfare and slaughter. It is named for the Roman god of war. As long as 3,000 years ago, Babylonian astronomer-astrologers called the planet Nergal for their god of death and pestilence.
- How far is Mars from Earth?Mars is less than 56 million km (35 million miles) from Earth at its closest approach, but it recedes to almost 400 million km (250 million miles)...
- What is the size of Mars?Mars is the second smallest planet in the solar system, only larger than Mercury and slightly more than half the size of Earth. It has an equatoria...
- What do Mars and Earth have in common?Mars is similar to Earth in many ways. Like Earth, it has clouds, winds, a roughly 24-hour day, seasonal weather patterns, polar ice caps, volcanoe...
- What is the temperature on Mars?The characteristic temperature on Mars in the lower atmosphere is about 200 kelvins (K; −100 °F, −70 °C), which is generally colder than the averag...
- When did Viking 1 and Viking 2 land on Mars?The Viking landers are two robotic U.S. spacecraft launched by the National Aeronautics and Space Administration (NASA) for the study of the planet...
- Should humans colonize space on Mars?Space colonization, on Mars or elsewhere, is widely debated. Some argue humans have a moral duty to save our species from extinction, and space col...
Mars is one of the most explored bodies in our solar system, and it's the only planet where we've sent rovers to explore the alien landscape. NASA missions have found lots of evidence that Mars was much wetter and warmer, with a thicker atmosphere, billions of years ago. Explore with Us
The geological history of Mars follows the physical evolution of Mars as substantiated by observations, indirect and direct measurements, and various inference techniques.
When the solar system settled into its current layout about 4.5 billion years ago, Mars formed when gravity pulled swirling gas and dust in to become the fourth planet from the Sun. Mars is about half the size of Earth, and like its fellow terrestrial planets, it has a central core, a rocky mantle, and a solid crust.
1 set 2019 · The geological history of Mars has been divided into three main periods, each named after a region of Mars: Noachian, Hesperian, and Amazonian. An earlier, Pre-Noachian, period has also been identified, even though no physical evidence for its existence remains.
