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 many planets are there in the solar system revolving around the sun?
How many planets are there in the solar system revolving around the sun?
admin
2009-06-24
45
问题
How many planets are there in the solar system revolving around the sun?
Earth is one of the planets which revolve 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. 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 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 365 days. A day on Mercury, however, is much longer than a day on Earth. Earth rotates on its axis once every 24 hours. Mercury rotates on its axis once every 359 days.
Venus 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 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 is called the red planet because of its definite 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.
For 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. Jupiter revolves around the sun once every 12 years, yet its day is amazingly 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/ADTd777K
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
SpaceResearchDoeswalkingonthemoonmakelifebetterforpeopleonearth?【51】alltheproblemsofourownworld,whyshou
HeatIsKillerExtremelyhotweatheriscommoninmanypartsoftheworld.Althoughhotweatherjustmakesmostpeoplefeel
TheHistoryofExaminationsInancienttimesthemostimportantexaminationswerespoken,notwritten.Intheschoolsofanc
CustomsoftheWorldIfyoutravelaroundtheworld,youwillbesurprisedtofindjusthowdifferenttheforeigncustomscanbe
CustomsoftheWorldIfyoutravelaroundtheworld,youwillbesurprisedtofindjusthowdifferenttheforeigncustomscanbe
A.fallasleepagainB.becomemoreenergeticthefollowingdayC.sleeplessthan7hoursD.confirmthoseseriousconsequences
A.milk,meat,vegetables,etc.weredeliveredB.ithaspromotedthesalesofmanykindsofcommoditiesC.foodscanbepreservedD
TheFridge1.Thefridgeisconsideredanecessity.Ithasbeensosincethe1960swhenpackagedfoodfirstappearedwiththe
ThetwoboysinChicagowereAccordingtopoliticians,whenchildrencommitcrimes,theyshouldbetreatedinthesamewayas
ImportanceofServicesTheUnitedStateshasmovedbeyondtheindustrialeconomystagetothepointwhereithasbecometheworl
随机试题
一患者昨晚饮食过多,致脘腹胀满,疼痛拒按,嗳腐吞酸,厌食,痛而欲泻,泻后痛减,粪便奇臭,脉滑。该患者的舌象最可能为
A、sinB、thinC、sunD、singD
A.平肝潜阳、熄风止痉B.平肝潜阳、清肝明目C.平肝潜阳、收敛固涩D.平肝潜阳、祛风通络龙骨与牡蛎都具有的功效是
进行动物人工配种,动物精液保存正确与否会直接影响配种受胎率,一般新鲜精液分常温和低温保存,而低温保存为0~5℃,常温保存常在多少温度()。
面部创伤清创术中,异物必须摘除的情况是
最可能的诊断是( )。该患者右上肺叩诊音可能出现( )。
钢筋连接的方式主要采取()。
按照管理层面的不同,零售商业物业的经营管理可以分为()两个层次。
主机与主机之间的三要素为:
Whenchildrenhitpuberty(青春期),theirabilitytolearnasecondlanguagedrops.Theyfindithardertolearntheirwayarounda
最新回复
(
0
)