1998年4月15日 · Interest in Mars, the fourth planet from the Sun, began long before people were able to send spacecraft to the Red Planet. Even early astronomers were able to see Mars’ brightness and position changes in the sky.
Mars: Facts - NASA Science - NASA Mars Exploration
Mars Facts Mars – the fourth planet from the Sun – is a dusty, cold, desert world with a very thin atmosphere. This dynamic planet has seasons, polar ice caps, extinct volcanoes, canyons and weather.
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Mars - NASA Science
MARS QUICK FACTS SIZE [equatorial diameter] FOR MORE INFO, VISIT: MARS.NASÅ.GOV The land area of Earth is similar to that of Mars. 1/10 642 sextillion kg DENSITY [average] Mars is about as dense as Earth. Earth 7926 miles 12756 Km [amount of matter] Mars 1/2 4220 miles 6792 Rm Earth's Moon 1/4 2159 miles 3475 Km 5972 sextillion kg kg VOLUME
Deimos - NASA Science - NASA Mars Exploration
Deimos is the smaller of Mars' two moons. It's 9 by 7 by 6.8 miles in size (15 by 12 by 11 kilometers). Deimos orbits Mars every 30 hours.
Mars - NASA Science - NASA Mars Exploration
Mars is no place for the faint-hearted. It’s dry, rocky, and bitter cold. The fourth planet from the Sun, Mars, is one of Earth's two closest planetary neighbors (Venus is the other). Mars is one of the easiest planets to spot in the night sky — it looks like a bright red point of light.
Learn About Me: Curiosity - NASA Mars Exploration
Curiosity is a car-sized, six-wheeled robot destined for Gale Crater on Mars. Its mission: to see if Mars ever could have supported small life forms called microbes...and if humans could survive there someday!
Mars with organisms from Earth. The spacecraft spent nearly a year cruising to Mars. Viking 1 reached Mars orbit June 19, 1976; Viking 2 began orbiting Mars August 7, 1976. After studying orbiter photos, the Viking site cer-tification team considered the original landing site proposed for Viking 1 unsafe. The team exam-ined nearby sites, and Viking
Mars Dust Storm - NASA Mars - NASA Mars Exploration
It's Storm Season on Mars. Mars has experienced significantly increased dust storm activity in recent weeks. Full caption ››
Mars One of five planets known to the ancients, Mars is known as the red planet because of its reddish color. At times it is the third brightest planet, after Venus and Jupiter. Mars was named by the Romans for their god of war. The fourth planet from the Sun, Mars is about 1.5 times farther from the Sun than Earth is. Radio sig-
tope ratios are clues to understanding the history of Mars’ atmosphere and water. The principal investigator is Paul Mahaffy of NASA’s Goddard Space Flight Center, Green-belt, Md. An X-ray diffraction and fluorescence instrument called CheMin …