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Planet Mars Educational Astronomy Posters
for the social studies and science classrooms and home schoolers.
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educational posters > science > astronomy > planets > Mars Posters < social studies
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Mars, [♂] the fourth planet from the Sun, is named after the Roman god of war (the month of March is also named for Mars).
Mars has a diameter of 6726 km (4180 +/- mi), a mass 0.15 times the mass of Earth, an orbital period of 682 to 3 weeks, and an average distance of around 228 million km (142 million mi).
Mars and its possible inhabitants have captured the imagination of Earthlings for years. In 1878 astronomer Giovanni Schiaparelli mistook what appeared as straight lines on the surface of Mars to be canals and author H. G. Wells wrote “War of the Worlds” in 1898 which Mercury Theater on the Air radio producer Orson Welles adapted into the ultimate Halloween horror story in 1938.
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Mars, known as the “Red Planet,” is the fourth planet from the Sun.
Facts About Mars
• Distance from the sun: 141.6 million miles
• Diameter: 4,223 miles
• Length of year: 687 Earth days
• Rotation period/lenth of “day”: 24 hours and 37 minutes
• Temperature: Minus 150º to minus 20º Fahrenheit
• Atmosphere: Carbon dioxide, nitrogen, argon, and small amounts of other gases
• Number of moons: 2
• Planets posters series
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Mar's Olympus Mons, the largest known volcano in the Solar System, is three times higher than Earth's Mount Everest. Olympus Mons is a shield volcano which means it has shallow-sloping sides resembling a warrior's shield. It is 342 miles in width with a caldera complex 53 miles long, 37 miles wide, and up to 1.8 miles deep with six overlapping pit craters.
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Meridiani Planium (plain) is the site of the impact crater Victoria Crater and in 2004 it was the landing site for the second of NASA's two Mars Exploration Rovers, named Opportunity.
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Valles Marineris (Mariner Valley) is the largest canyon system in the Solar System
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Martian Canals -
Italian astronomer Giovanni Schiaparelli observed Mars and believed he saw “seas” and “continents”; he named the long straight formations canali in Italian. Years later the “canals” were shown to be an optical illusion.
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The Hubble Space Telescope obtained these images in the spring of 1999, when Mars was only 87 million km (54 million mi) from Earth. The white, circular region at the top of the image is the north polar cap.
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Montage of planetary images taken by spacecraft managed by the Jet Propulsion Laboratory in Pasadena, CA. From top to bottom - Mercury, Venus, Earth (and Moon), Mars, Jupiter, Saturn, Uranus and Neptune. The image of Mercury was taken by Mariner 10, Venus was taken by Magellan, Earth and Moon were taken by Galileo, Mars was taken by Mars Global Surveyor, Jupiter was taken by Cassini, Saturn, Uranus and Neptune were taken by Voyager. Inner planets (Mercury, Venus, Earth with Moon, and Mars) are roughly to scale to each other; the outer planets (Jupiter, Saturn, Uranus, and Neptune) are roughly to scale to each other. Image courtesy of Jet Propulsion Laboratory.
• more planets posters
• more Solar System posters
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The Romans gave the red planet the name of their god of war, Mars.
• Italy posters
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