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2 giorni fa · Phobos (/ ˈ f oʊ b ə s /; systematic designation: Mars I) is the innermost and larger of the two natural satellites of Mars, the other being Deimos. The two moons were discovered in 1877 by American astronomer Asaph Hall. It is named after Phobos, the Greek god of fear and panic, who is the son of Ares (Mars) and twin brother of ...
- 2.138 km/s
- Mars
- 1640±8 km²
5 giorni fa · Mars is the fourth planet in the solar system in order of distance from the Sun and the seventh in size and mass. It is a periodically conspicuous reddish object in the night sky. There are intriguing clues that billions of years ago Mars was even more Earth-like than today.
6 giorni fa · The atmosphere of Mars is a resource of known composition available at any landing site on Mars. It has been proposed that human exploration of Mars could use carbon dioxide (CO 2 ) from the Martian atmosphere to make methane (CH 4 ) and use it as rocket fuel for the return mission.
- 610 Pa (0.088 psi; 4.6 mmHg; 0.0060 atm)
- 2.5x10¹⁶ kg
- 95%
- 2.8%
5 giorni fa · Structure and Surface. Mars is a terrestrial planet. It is small and rocky. Mars has a thin atmosphere. Mars has an active atmosphere, but the surface of the planet is not active. Its volcanoes are dead. Time on Mars. One day on Mars lasts 24.6 hours. It is just a little longer than a day on Earth. One year on Mars is 687 Earth days.
2 giorni fa · The Moon is Earth 's only natural satellite. It orbits at an average distance of 384,400 km (238,900 mi), about 30 times the diameter of Earth. Over time Earth's gravity has caused tidal locking, causing the same side of the Moon to always face Earth.
- 405400 km, (404000–406700 km)
- 362600 km, (356400–370400 km)
- Earth I
- or
5 giorni fa · We are testing this hypothesis with the early Mars Global Climate Model (eMGCM), a version of the MGCM with special physical treatments for ancient Mars that utilizes the legacy Arakawa c-grid dynamical core. Simulations include impacts of various diameters (30 km, 50 km, and 100km) and different surface pressure scenarios (150 mbar, 1 bar, and ...
5 giorni fa · Scientists believe that the Moon formed early in the solar system’s history after Earth and an object about the size of Mars smashed into each other. The impact sent chunks of Earth and the impactor into space that were pulled together by gravity, creating the Moon.
