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  3. Scientists said they have found evidence of a giant planet far out in our solar system. In a statement, the California Institute

Scientists said they have found evidence of a giant planet far out in our solar system. In a statement, the California Institute

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问题    Scientists said they have found evidence of a giant planet far out in our solar system. In a statement, the California Institute of Technology—Caltech—said this planet travels a very strange "long and thin orbit in the distant solar system. " The discovery was made by two researchers at Caltech: Konstantin Batygin and Mike Brown. They used mathematical modeling and computer simulations(模拟) to find the planet. So far, there have not been any direct observations of the planet.
   "My jaw hit the floor," said astronorner(天文学家) Mike Brown, the moment he realized there might be a ninth planet.
   The scientists said it would take this planet 10,000 to 20,000 years just to make one full orbit around the sun. The new planet, called "Planet Nine", has a mass about 10 times the size of the earth. If they are right, the newly found planet would be the ninth planet in our solar system. Pluto (冥王星) had been called the ninth planet until 2006, when it was renamed a "dwarf planet".
   Actual confirmation of a ninth planet would be very big news. "This would be a real ninth planet," Brown said in the statement. " There have only been two true planets discovered since ancient times, and this would be a third. It’ s a pretty substantial part of our solar system that’ s still out there to be found, which is pretty exciting. "
   While they did not get a picture of " Planet Nine" yet, the scientists say they are using the biggest and best telescopes on the earth to try to find " Planet Nine". They are also working on improving their computer simulations. They want to find out more about "Planet Nine’ s orbit" , and its impact on the outer part of our solar system.
The newly found planet______.
选项 A、moves around the sun
B、was discovered by two astronomers
C、travels around orbit
D、is far away from our solar system
答案A
解析 根据第三段第一句“The scientists said it would take this planet 10，000 to 20，000 years just to make one full orbit around the sun．”可推知，这颗新发现的行星是围绕太阳转的，所以选项A正确；根据第一段第三句“The discovery was…Brown．”可知，是两位研究人员发现了这颗行星，所以选项B错误；根据第一段第二句“…long and thin orbit…”可知，选项C错误；根据第一段第一句“…far out in our solar system．”可知，它是在太阳系较远的地方，而不是选项D(离太阳系很远的地方)。故选A。
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