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
37
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
Mercury.
解析
转载请注明原文地址:https://www.kaotiyun.com/show/5DTd777K
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
SomethingMenDoNotLiketoDoEricBrownhatesshopping."It’sjustnotenjoyabletome,"saidthe28-year-old.Chicagoma
PushbikePerilLowspeedbicyclecrashescanbadlyinjureorevenkillchildreniftheyfallontotheendsofthehandlebars
PushbikePerilLowspeedbicyclecrashescanbadlyinjureorevenkillchildreniftheyfallontotheendsofthehandlebars
SpaceResearchDoeswalkingonthemoonmakelifebetterforpeopleonearth?【51】alltheproblemsofourownworld,whyshou
SpaceResearchDoeswalkingonthemoonmakelifebetterforpeopleonearth?【51】alltheproblemsofourownworld,whyshou
One-roomSchoolsOne-roomschoolsarepartoftheheritageoftheUnitedStates,andthementionofthemmakespeoplefeela
CustomsoftheWorldIfyoutravelaroundtheworld,youwillbesurprisedtofindjusthowdifferenttheforeigncustomscanbe
Accordingtothepassage,whichofthefollowinghaschangedthemostinthelast500years?"Some"inthelastsentenceofthe
She’soneofthesmarteststudentsinthewholeschool.
ImproveComputer-researchSkillsLikemanycollegestudents,JoseJuarezcarriesaroundapocket-sizedcomputerthatletshi
随机试题
电化学驱动力决定了离子跨膜流动的方向和速度,而驱动力的改变主要由什么引起
用复制法炮制的药材是
关于全脱位的成熟恒牙牙齿复位固定,以下描述不正确的是
肝硬化门静脉高压症最具诊断价值的表现是
房地产开发企业暂定资质的条件不低于()级资质。
关于借款费用资本化,下列说法中正确的有()。
虚拟存储器最基本的特征是()。
售货员:“显像管是任何一台电视机的核心元件。P品牌电视机与T品牌电视机使用的是相同质量的显像管,但P品牌电视机的售价较低,所以当你购买P品牌电视机而非T品牌电视机时,就等于付了更低的价钱却买了相同图像质量的电视机。”下列()项如果正确,将最有力地
南京临时政府颁布的社会改革法令包括()。(2011多60)
A、Heistired.B、Heislazy.C、Heissick.D、Heisawesome.A对话中男士说不知道教授怎么回事,因为早上发现他在办公室睡觉,女士听后说He’s…weary,[A]项中的tired与weary同义,故
最新回复
(
0
)