火星Ma
红色行星 - 我们的下一片疆土。
关于 火星
火星几个世纪以来一直吸引着人类的想象。它锈红的表面、极地冰盖、太阳系最高的火山 - 奥林匹斯山 - 都暗示着它活跃的过去。漫游车已找到古代水流的证据，并正在寻找过往生命的痕迹。
铁核、硅酸盐地幔、氧化铁表面
95% 二氧化碳、3% 氮、1.6% 氩
你知道吗？
- ·奥林匹斯山高 22 公里 - 接近珠穆朗玛峰的 3 倍。
- ·火星上的日落是蓝色的。
- ·火星日 (sol) 只比地球日长 39 分钟。
- ·火星拥有太阳系最大的尘暴。
来自 NASA
Mars - NASA Science
Mars is the fourth planet from the Sun, and the seventh largest. It’s the only planet we know of inhabited entirely by robots.
Mars is the fourth planet from the Sun, and the seventh largest. It’s the only planet we know of inhabited entirely by robots.
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.
Despite being inhospitable to humans,
Learn about its formation, structure, atmosphere, size and distance, moons, and much more.
The first mission devoted to observing the Martian atmosphere and its evolution, NASA’s MAVEN (Mars Atmosphere and Volatile Evolution) has ended after more than 11 years in orbit at Mars and a decade beyond its primary, one-year mission.
The spacecraft successfully maneuvered around Mars on May 15, speeding it up and setting its course for the main asteroid belt, where it will study the asteroid Psyche in 2029. The flyby also served as a training run, during which Psyche calibrated its instruments ahead of its asteroid encounter, while capturing unique views of the Red Planet.
Mars: Facts - NASA Science
Mars is one of the most explored bodies in our solar system, and it's the only planet where we've sent rovers to roam the alien landscape.
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.
Mars is one of the most explored bodies in our solar system, and it's the only planet where we've sent rovers to roam the alien landscape. NASA missions have found lots of evidence that Mars was much wetter and warmer, with a thicker atmosphere, billions of years ago.
Mars was named by the ancient Romans for their god of war because its reddish color was reminiscent of blood. Other civilizations also named the planet for this attribute — for example, the Egyptians called it "Her Desher," meaning "the red one." Even today, it is frequently called the "Red Planet" because iron minerals in the Martian dirt oxidize, or rust, causing the surface to look red.
Scientists don't expect to find living things currently thriving on Mars. Instead, they're looking for signs of life that existed long ago, when Mars was warmer and covered with water.
With a radius of 2,106 miles (3,390 kilometers), Mars is about half the size of Earth. If Earth were the size of a nickel, Mars would be about as big as a raspberry.
From an average distance of 142 million miles (228 million kilometers), Mars is 1.5 astronomical units away from the Sun. One astronomical unit (abbreviated as AU), is the distance from the Sun to Earth. From this distance, it takes sunlight 13 minutes to travel from the Sun to Mars.
Mars Moons - NASA Science
Mars has two moons, Phobos and Deimos. Both are thought to be captured asteroids, or debris from early in the formation of our solar system.
Phobos is on a collision course with Mars.
Deimos is a small and lumpy, heavily cratered object.
Mars is the fourth planet from the Sun, and the seventh largest. It’s the only planet we know of inhabited…
Mars has two moons, Phobos and Deimos. Both are thought to be captured asteroids, or debris from early in the…
Phobos is the larger of Mars' two moons. It orbits Mars three times a day, and is so close to…
Deimos is the smaller of the two Martian moons and is less irregular in shape.