There is also evidence of flooding that occurred less than several million years ago, most likely as the result of the release of water from aquifers deep underground or the melting of ice. Although recent study has suggested that Mars may have initially had a substantial atmosphere, largely of...
this wasn’t always the case. Roughly 1.35 million years ago, Mars had an eccentricity of just 0.002, making its orbit nearly circular. It reached a minimum eccentricity of 0.079 some 19,000 years ago, and will peak at about 0.105 in about 24,000 ...
In the 1960s, humans set out to discover what the red planet has to teach us. Now, NASA is hoping to land the first humans on Mars by the 2030s.
In the next 20-40 million years Mars’ largest moon Phobos will be torn apart by gravitational forces leading to the creation of a ring that could last up to 100 million years. Sunsets on Mars are blue. During the martian day the sky is pinkish-red, this is the opposite of the Earth...
Those instruments studied minerals that suggest the presence of a large quantity of liquid water at the site about 700 million years ago, which scientists previously thought was dry.(来自中国科学院(CAS)的研究员刘洋和他的同事分析了“祝融”号上三种不同仪器的数据。这些仪器研究的矿物质表明,大约7亿...
"That's not too surprising, because [somewhere] between 3.5 [billion] and 4 billion years ago, you had all this stuff flying around the solar system, and the planets were getting bombarded with a lot of impactors that formed all these craters on the moon and on Mars, so that very activ...
The mission team traced two of the largest detected marsquakes to Cerberus Fossae, which "contains faults, volcanic flows and liquid water outflow channels with ages as recent as 2-10 Ma [million years ago], and possibly younger from impact crater counts," Banerdt and his colleagues wrote in...
【答案】(1)猜测词义题。根据文章第一段Butanewstudypresentsevidenceofwateractivityfromabout700millionyearsago,posinganewpuzzleaboutMarsanditshistoryforscientiststocrackintheirfuturestudies.(但是一项新的研究提出了大约7亿年前水活动的证据,为科学家在未来的研究中___火星及其历史提出了一个新的难题。)可知crack的意...
"It is sad, Sola, that you were not born a million years ago," snapped Sarkoja, "when all the hollows of the land were filled with water, and the peoples were as soft as the stuff they sailed upon. In our day we have progressed to a point where such sentiments mark weakness and ...
Phobos is gradually spiraling toward Mars, drawing about 6 feet (1.8 meters) closer to the Red Planet each century. Within 50 million years, Phobos will either smash into Mars or break up and form a ring of debris around the planet. ...