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火星的生命英語(yǔ)作文
在日常學(xué)習(xí)、工作和生活中，許多人都寫(xiě)過(guò)作文吧，借助作文人們可以反映客觀事物、表達(dá)思想感情、傳遞知識(shí)信息。寫(xiě)起作文來(lái)就毫無(wú)頭緒？下面是小編為大家收集的火星的生命英語(yǔ)作文，歡迎大家分享。
火星的生命英語(yǔ)作文 1
The current understanding of planetary habitability—the ability of a world to develop and sustain life—favors planets that have liquid water on their surface.
This most often requires that the orbit of a planet lie within the habitable zone, which for the Sun currently extends from just beyond Venus to about the semi-major axis of Mars.During perihelion Mars dips inside this region, but the planet’s thin (low-pressure) atmosphere prevents liquid water from existing over large regions for extended periods. The past flow of liquid water, however, demonstrates the planet’s potential for habitability. Recent evidence has suggested that any water on the Martian surface would have been too salty and acidic to support terrestrial life.pounds would quickly break down in the Martian atmosphere.It is possible that these compounds may instead be replenished by volcanic or geological means such as serpentinization.
火星的生命英語(yǔ)作文 2
I represent Mars. I have a striking red appearance. When I am opposite the sun, I am in the most favourable position for viewing. Yeh, how handsome I am
The mean distance of me from the sun is about 141 million mi (228 million km); its period of revolution is about 687 days, almost twice that of the earth. At those times when the sun, earth, and I are aligned (i.e., in opposition) and I am at my closest point to the sun (perihelion), its distance from the earth is about 35 million mi (56 million km); this occurs every 15 to 17 years. At oppositions when I am at my greatest distance from the sun (aphelion) it is about 63 million mi (101 million km) from the earth. It rotates on its axis with a period of about 24 hr 37 min, a little more than one earth day.
Last and not least, I wish I know more about Mars. However, I realize that I dont need to. You really should learn about Mars and write something about it in English for your own studies.
Good luck!
火星的生命英語(yǔ)作文 3
At the first sight the planet Mars does not appear very welcome to any kind of life. It has very little oxygen and water, the temperature at night is below –50 and winds of 100 miles per hour cause severe dust storms. However, the surface of the planet seems to show that water flowed across it some time in the past, and it is believed that there is enough ice at the poles to cover the planet with water if it melts, Although there is no life on the Mars now, some scientists think that there may have been some form of life long time ago.At that time ,the planet had active volcanoes;the atmosphere was thicker and warmer;and there was water. In fact,in some ways the Mars may have been similar to the Earth, where life exists.
Some people believe that the Mars could support life in the future if the right conditions were produced. The first step would be to warm the planet using certain gases which trap the Sun’s heat in the planet’s atmosphere. With warmth,water and carbon dioxide ,simple plants could begin to grow. These plants could slowly make the Mars more suitable for living, It is estimated that the whole process might take between 100,000 and 200,000 years. In the meantime, people could begin to live on the planet in special closed environments.They would provide a lot of use ful information about conditions on the Mars and the problems connected with living there.
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