| rdfs:comment | - Mars is the fourth planet from the Sun in our Solar System. Mars can be seen from Earth with the naked eye. A terrestrial planet with a thin atmosphere, Mars has surface features both of the Moon and the Earth. It is the site of Olympus Mons, (a good launch site for spaceship takeoff), the highest known mountain in the solar system, and Valles Marineris, the largest canyon (a great spot for habitation as planets atmosphere would be densest in those areas). Mars’ rotational period and seasonal cycles are similar to those of Earth. Until 1965, it was speculated that the planet might house liquid water on the planet.
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| abstract | - Mars is the fourth planet from the Sun in our Solar System. Mars can be seen from Earth with the naked eye. A terrestrial planet with a thin atmosphere, Mars has surface features both of the Moon and the Earth. It is the site of Olympus Mons, (a good launch site for spaceship takeoff), the highest known mountain in the solar system, and Valles Marineris, the largest canyon (a great spot for habitation as planets atmosphere would be densest in those areas). Mars’ rotational period and seasonal cycles are similar to those of Earth. Until 1965, it was speculated that the planet might house liquid water on the planet. This was based on observations of seasonal changes in light and dark patches, dark striations were suspected to be channels for irrigation. Of all the planets in our solar system other than Earth, Mars is thought to be the most likely to harbor liquid water, and perhaps life. Observations indicate that small geyser-like water flows have occurred in recent years. Further observations by NASA's Mars Global Surveyor show evidence that parts of the southern polar ice cap have been receding. Mars may have a rise in temperature. Mars has two moons, Phobos and Deimos, which are small and irregularly shaped. These may be captured asteroids.
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