首页
外语
计算机
考研
公务员
职业资格
财经
工程
司法
医学
专升本
自考
实用职业技能
登录
外语
How may planets are there in the solar system revolving around the sun?
How may planets are there in the solar system revolving around the sun?
admin
2012-01-20
48
问题
How may planets are there in the solar system revolving around the sun?
Earth is one of nine planets which revolve (绕转) around the sun. This family of planets, with their moons, is known as the solar system. Since we live on Earth, we think it is the most important planet. But the other planets are also interesting. Some are smaller than Earth, some larger: some are hotter, some colder. Each one is different from all the others and has something special about it. No one knows for certain how the solar system began. We do know a lot about the planets, however, from the science of astronomy (天文学). Astronomers have done research on the planets and other objects in space for thousands of years. Astronomy is a very complicated science. We look at the other planets to study them, but the planet we are on is moving all the time. Computers have helped us in the past twenty or thirty years. The satellites we send into space to measure and take pictures also tell a lot about the planets and help us to understand them.
Mercury (水星) is the closest planet to the sun. It is also the smallest and fastest planet. The speed of the planet gave it its name: Mercury was the rapid messenger of the Roman gods. Mercury completes its orbit around the sun in only 88 days, while Earth’s orbit takes 3651/4 days. A day on Mercury, however, is much longer than a day on Earth, Earth rotates on it axis once every 24 hours. Mercury rotates on its axis once every 59 days.
Venus (金星) is the second planet in distance from the sun. It is about the same size as Earth, and it comes closer to Earth than any other planet. Next to the sun and the moon, Venus is the easiest object in the sky to see. People of ancient times loved its brightness and beauty so much that they named it after the Roman goddess of love and beauty.
Venus revolves around the sun once every 225 days and rotates on its axis once every 224 days. Information from telescopes and satellites shows to us that the planet is very hot. The temperature is usually between 300 and 675 degrees Celsius. We can observe both Venus and Mercury either in the evening or early in the morning just before the sun rises.
Mars (火星) is called the red planet because of its definite (明确的) red — orange color. It is the fourth farthest planet from the sun. A day on Mars is only about 40 minutes longer than a day on Earth, but a year lasts 687 days. The planet was named after the Roman god of war.
During many years, people believed that there was life on Mars, but we now know that there probably isn’t. The Mariner space program sent many satellites to Mars. We have excellent photos and information on this neighbor planet, and nothing suggests that there is any life there.
The fifth planet from the sun is also the largest of all the planets, Jupiter (木星). Jupiter revolves around the sun once every 12 years, yet its day is amazingly (惊人地) short. Its rotation, or its day, is only about 10 hours long. This is the fastest rotation — the shortest day — of any of the planets.
The planet’s name is appropriate, since Jupiter was the largest Roman god — the king of all the other gods. If you can imagine Jupiter as a hollow ball, all of the other planets would fit inside and there would still be a lot of room left. Jupiter has fourteen moons, the largest number of any planet.
选项
答案
Jupiter
解析
转载请注明原文地址:https://kaotiyun.com/show/a1Xd777K
本试题收录于:
公共英语五级笔试题库公共英语(PETS)分类
0
公共英语五级笔试
公共英语(PETS)
相关试题推荐
AImportanceofClassroomLearningBTelevision--ARichSourceofInformationCAdvertisementsasImportantMessagesfromt
TrafficJams—NoEndinSight1.Trafficcongestion(拥堵)affectspeoplethroughouttheworld.Trafficjamscausesmogindozens
ManofFewWordsEveryonechasessuccess,butnotallofuswanttobefamous.SouthAfricanwriterJohnMaxwellCoetzee
TheBeginningofAmericanLiteratureAmericanhasalwaysbeenalandofbeginnings.【C1】______Europeans"discovered"America
Ofthefollowingmovementsinstructedbythebrain,whichoneisnotmentionedinthearticle?Thefindingsofthestudywithm
ThespeakersaremakingarrangementsforMonday,TuesdayandWednesday.
Thepassageismainlyconcernedwith______.Farmersshouldnotbeblamedfortherisebecause______.
Whatshouldonedoifhewantstoworkmoreefficientlyathislowpointinthemorning?
Whatarethespeakerstryingtodo?
Whatisthestudentinterestedinexactly?
随机试题
格形钢板桩结构的格形墙体前板桩的设计入土深度,对于中密砂土地基不应小于()m,且不宜大于()m。
焊缝金属中氢的危害也有()。
下列哪种物质同时抑制电子传递和ATP生成
()指的是商业银行为保证客户在银行为客户对外出具具有结算功能的信用工具,或提供资金融通后按约履行相关义务,而与其约定将一定数量的资金存人特定账户所形成的存款类别。在客户违约后,商业银行有权直接扣划该账户中的存款,以最大限度地减少银行损失。
外资独资银行、合资银行、外国银行分行开办需要批准的个人理财业务,应按照有关外资银行业务审批程序的规定,报()审批。
企业收入的发生往往会引起()。
临时导游证必须由旅行社根据需要向旅游行政部门申请领取。()
“严慈相济”体现的德育原则是()
1KB的准确数值是()。
______theflood,theshipwouldhavereacheditsdestinationontime.
最新回复
(
0
)