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The picture was taken just 11 hours before Mars made its closest approach to us in 60,000 years. Befitting the red planet's bloody color, the Romans named it after their god of war.
The Romans copied the ancient Greeks, who also named the planet after their god of war, Ares.
It is a shield volcano, with slopes that rise gradually like those of Hawaiian volcanoes, and was created by eruptions of lavas that flowed for long distances before solidifying.
Mars also has many other kinds of volcanic landforms, from small, steep-sided cones to enormous plains coated in hardened lava.
NASA's Hubble Space Telescope snapped this shot of Mars on Aug.
Mars has the largest volcanoes in the solar system, including Olympus Mons, which is about 370 miles (600 km) in diameter, wide enough to cover the entire state of New Mexico.
Other civilizations also typically gave the planet names based on its color — for example, the Egyptians named it "Her Desher," meaning "the red one," while ancient Chinese astronomers dubbed it "the fire star." Regolith The bright rust color Mars is known for is due to iron-rich minerals in its regolith — the loose dust and rock covering its surface.
The soil of Earth is a kind of regolith, albeit one loaded with organic content.
This means that although this desert planet is just half the diameter of Earth, it has the same amount of dry land.
The red planet is home to both the highest mountain and the deepest, longest valley in the solar system.
Some minor eruptions might still occur on the planet.