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
28
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
Computers and satellites.
解析
转载请注明原文地址:https://kaotiyun.com/show/wDTd777K
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
ShoppingatSecond-handClothingStoresWhen33-year-oldPeteBarthwasincollege,shoppingatsecond-handcl
PushbikePerilLowspeedbicyclecrashescanbadlyinjureorevenkillchildreniftheyfallontotheendsofthehandlebars
SpaceResearchDoeswalkingonthemoonmakelifebetterforpeopleonearth?【51】alltheproblemsofourownworld,whyshou
TheHistoryofExaminationsInancienttimesthemostimportantexaminationswerespoken,notwritten.Intheschoolsofanc
HowthewriterstartedsmokingshowsthepowerfulinfluenceofThebookcalledHowtoStopSmoking
A.publictransportationB.thehandshakeC.abusinessmeetingD.lineofpeopleE.herkidsF.longperiodofsilenceWhenme
TheMostWonderfulIslandsThePalmIslandsarethelargestartificialislandsintheworldandareunderconstructioninDu
HeatIsKillerExtremelyhotweatheriscommoninmanypartsoftheworld.Althoughhotweatherjustmakesmostpeoplefeel
TheBeginningofAmericanLiteratureAmericahasalwaysbeenalandofbeginnings.AfterEuropeans"discovered"Americaint
TheWhiteHouseWegetupearlythismorningand【51】alongwalkafterbreakfast.Wewalkedthroughthebusinesssectionof
随机试题
手术显微镜的叙述不正确的是
患儿,男,2岁。鼻塞不适、咳嗽无痰、寒战、发热1天。查体:体温38.4℃,双肺呼吸音较粗,未闻及干湿啰音。胸部X线检查:肺纹理增粗。关于本病的预防,以下不正确的是
下列关于特殊的普通合伙企业的表述中,正确的是( )。
使用特雷诺指数时,一个结构简单的基金往往会表现更高的风险。()
某上市公司董事会秘书李某执行公司职务时,违反公司章程的规定,给公司造成了损失。王某是该公司连续1年持有10%股份的股东,欲起诉李某。王某的正确做法是()。
张载说:“有象斯有对,对必反其为。有反斯有仇,仇必和而解。”这告诉我们()。
《老残游记》、《西游记》、《聊斋志异》、《儒林外史》四部作品的作者依次是()。
我们把海螺壳扣在耳朵上,可以听到像海潮一样的声音,其实这是:
下列关于明朝婚姻制度的表述,正确的是()。
Mathematicalabilityandmusicalabilitymaynotseemonthesurfacetobeconnected,butpeoplewhohaveresearchedthesubject
最新回复
(
0
)