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
51
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
ShoppingatSecond-handClothingStoresWhen33-year-oldPeteBarthwasincollege,shoppingatsecond-handcl
SpaceResearchDoeswalkingonthemoonmakelifebetterforpeopleonearth?【51】alltheproblemsofourownworld,whyshou
One-roomSchoolsOne-roomschoolsarepartoftheheritageoftheUnitedStates,andthementionofthemmakespeoplefeela
AcrosstheDesertTheSaharaDesertisthelargestdesertintheworld.ItstretchesacrossAfricafromSenegaltoEgypt.The
Whendidtheauthorfallinlovewiththeboy?Whoadvisedhertobreakupwithhim?
Whatdoesthephrase"turnthetablesontheirteachers"inPara.1mean?Whyhasthestudents’expectationoftheircoursesch
ImproveComputer-researchSkillsLikemanycollegestudents,JoseJuarezcarriesaroundapocket-sizedcomputerthatletshi
ImproveComputer-researchSkillsLikemanycollegestudents,JoseJuarezcarriesaroundapocket-sizedcomputerthatletshi
WhatdidthesailorsplantodotoDionysos?
WhatdidthesailorsplantodotoDionysos?
随机试题
2001年5月5日,甲拒绝向乙支付到期租金,乙忙于事务一直未向甲主张权利。2001年8月,乙因出差遇险无法行使请求权的时间为20天。根据《民法通则》的规定,乙请求人民法院保护其权利的诉讼时效期间是()。(2002年)
(2009年4月)不受1989年《死者遗产继承法律适用公约》所确定的准据法支配的有:_____;_____;_____;_____。
属于波特-劳勒综合激励过程模型中的内在回报是【】
患儿女,4岁。急诊入院,半小时前突然意识不清,瞳孔缩小,流涎,心(-),两肺痰鸣音,不发热,血压正常。此患儿如果做血液净化,最适合做
某男性患者,29岁。因车祸发生腹股沟处大量出血,现场医务工作者应该采取的止血方法是()
阴虚风动的病因是
背景我国北方某机场地处黄河岸边,飞行区等级为4C。2016年3月~2017年5月,该机场飞行区进行了改扩建。改扩建的基本内容为:(1)机场跑道向东南延长300m,道面加宽至45m;(2)在现有跑道上加盖沥青混凝土,沥青混凝土厚度为15cm,跑道延长部分也
有位家长抱怨“别的孩子聪明伶俐,能说会道,自己的孩子却口齿不清,笨手笨脚”。这位家长的说法与当代儿童观相违背的观点是()。
设A,B为3阶矩阵且A不可逆,又AB+2B=O且r(B)=2,则|A+4E|=()。
______thatsomeguestswerecoming,sheshoppedallmorninginthatsupermarket.
最新回复
(
0
)