Mars Planet - статья по прочим предметам
Тезисы:
- In 1976 the Viking spacecraft landed on Mars and studied sites at Chryse and Utopia.
- Mars has two natural satellites, discovered by Asaph Hall in 1877.
- Satellites of Mars.
- This color may be due to various oxides in the surface composition, particularly those of iron.
- In 1971 the Mariner 9 space probe discovered a huge canyon, Valles Marineris.
- They recorded a desert environment with a reddish surface and a reddish atmosphere.
- The American rovers Spirit and Opportunity landed successfully in early 2004.
- However, there is no evidence of current volcanic activity.
- There is evidence of erosion caused by floods and small river systems.
- Rovers have identified minerals that only form in the presence of liquid water.
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