The James Webb Space Telescope was launched on December 25, 2021. It’s a space telescope developed by NASA, the European Space Agency and the Canadian Agency. Named after James E.Webb, who created Apollo program, this telescope is a replacement for the Hubble Space Telescope, which headed to space in 1990.
Webb is different from Hubble in some ways. It can see infrared light which makes it possible to look through clouds of gas and dust in the universe and explore the very distant galaxies.With a 6.5-meter-wide golden mirror, it can collect more than six times as much light as the Hubble mirror, so it can see tiny objects more clearly. To “see” faint galaxies in infrared light, Webb needs to be extremely cold, or it would only see its own infrared light. Made of a thin plastic, the heat shield is five layers thick, and it keeps the mirror at minus 234°C. Besides, Hubble moves only about 550 km above Earth while Webb orbits the sun, 1.5 million kilometres away from Earth. This lets Webb stay in line with Earth, allowing the moon to protect it from the light and heat of the sun and Earth.
As the most powerful telescope ever made, Webb is a giant step forward in human space exploration. With it, scientists can observe the very distant galaxies to see how the first galaxies forming out of the darkness. By comparing the earliest galaxies with today’s, they may understand how galaxies have changed over time. It’s also possible for them to study the atmospheres of the faraway planets and search for possible signs of life. Above all, seeing through and into clouds of dust also allows them to find out where stars and planetary systems are being born. This is the primary goal of Webb.
Webb is scheduled to work in space for between five and ten years, so it has enough time to send back fascinating data and images and give us a big surprise.
1. Webb is a space telescope that ________.A.was sent to space in 1990 |
B.will take the place of Hubble |
C.was made by NASA alone |
D.is named after Webb’s creator |
A.works in higher temperatures |
B.can look deeper into the universe |
C.moves closer around the earth |
D.can see tiny objects as clearly as it |
A.Looking for life on the faraway planets. |
B.Studying the formation of the first galaxies. |
C.Studying new stars and planet formations. |
D.Finding out the change process of galaxies. |
A.The Working Time of Space Telescopes |
B.The Differences between Webb and Hubble |
C.The Most Powerful Telescope Has Come |
D.The Discoveries Scientists Have Made with Webb |
相似题推荐
【推荐1】Mostly, inventions happen because someone works to solve a problem. Kids are natural inventors. They often create amazing things from simple ideas. Here are a few examples that might make you wonder, "Why didn't I think of that?"
Popsicles
Popsicles were invented by 11-year-old Frank Epperson in 1905. He forgot a drink of juice and left it with a stir(搅拌)stick in it outside on a cold night. The next day it was ice. Because of this he couldn't drink it any more, but he could eat it. It tasted good! These ice sticks became popular among kids at school in summer because they were delicious and helped them stay cool. More than a hundred years later, popsicles are sill one of the best summer treats!
Crayon Holders
When 11-year-old Cassidy Goldstein needed crayons for a school project, she had a hard time because there were so many small or broken ones. She found some small clear plastic tubes(管子)at home. Although the tiny tubes were usually filled with water to keep flowers fresh, she found that they fit tightly(紧紧地)around the crayons. She was now able to hold them easily. This is how she invented Crayon Holders.
Wristies
When snow gets in kids' gloves and their hands get wet, they feel uncomfortable. 10-year-old Kathryn Gregory decided to do something about it. She created the wristies as she wanted to keep her wrists(手腕)warm and dry. Wristies are long gloves with no fingers and they are worn under your coat. They help you when you work in the cold because your hands stay warm while you use your fingers. With her parents' help, Kathryn also opened a small shop where she sold her wristies. And she still runs it today.
All these inventions have one thing in common-the kids were trying to solve problems in their lives. When you meet problems, what would you do? If the kids can do it, you can do it, too!
1. Popsicles became popular among kids at school in summer because .A.they could not only drink them but also eat them |
B.they tasted good and helped them stay cool |
C.the stir sticks were useful in popsicles |
D.it was easy to make them |
A.经营 |
B.跑步 |
C.行驶 |
D.竞赛 |
A.A novel. |
B.A guidebook. |
C.A science magazine. |
D.A poster. |
A.Let us run a shop like Kathryn. |
B.Everyone can become an inventor by accident. |
C.Kids are so clever that they can invent things. |
D.When you meet problems, never give up and you can solve them well. |
【推荐2】Every year, Time magazine puts out its list of the year’s best inventions. Some of them help us solve problems, while others make life easier or more fun. Here are three of the inventions on this year’s list, which one do you think is the best?
Life-like AnimalsAt the Hologram Zoo (全息动物园) in Australia, you don’t just see a giraffe. You see a group of giraffes running towards you and then over you. “We show people things they have never seen before,” says the zoo’s CEO. Visitors to the zoo can see life-like wonders. Thanks to hologram technology, the public can see wildlife which don’t need to be kept in cages.
Stopping FiresAlert California is a safety program in California that is a state of America. It uses AI to predict wildfires. The AI detector (探测器) uses more than a thousand cameras in forests across the state. It can spot smoke and other early signs of fire. In two months, the program correctly predicted 77 fires before any 911 calls came in.
Air on MarsIf astronauts land on Mars in the future, they’ll need air to breathe and a way to get home. NASA’s Moxie can help solve both problems. This small equipment can separate oxygen (气) from the atmosphere (大气) on Mars and help astronauts breathe. In addition, the oxygen can be used to provide energy for spaceships. This is important for sending astronauts home from Mars.
1. What makes the Hologram Zoo in Australia special?A.The high technology. | B.A safety program. | C.The CEO. | D.A spaceship. |
A.斑点 | B.发现 | C.阻止 | D.部署 |
A.To predict the fires. | B.To meet the needs of breath. |
C.To call the spaceship. | D.To send animals home. |
A.The three inventions can help us solve problems. |
B.You can see many animals in cages at the Hologram Zoo. |
C.Everyone in America can use AI to predict wildfires. |
D.The astronauts who land on Mars don’t need air to breathe. |
A.History. | B.Business. | C.Culture. | D.Science. |
An invention competition! What you need to do is simple. Come up with an idea for a futuristic (想象未来情况的) invention that will help people in their everyday life, and draw a picture of it. It could be anything from a robot who cleans the house to a machine that does your homework for you. Think big and get creative! The purpose is to design something that is fun as well as helpful. Think about what the future might look like and what would make life easier and more enjoyable. Why not give your invention a name too? |
Who can enter? The competitors can be anyone aged between 9 and 16. If you enter as a team, your team should have three members at most. |
How to enter? Send a picture of your invention to prize @nosycrow.com between October 11 and November 1, 2021. |
WIN! You could win a book card worth $500 and your own robot friend, a Wonder Workshop Dash Robot, worth £47! |
Got a question? Click here. |
A.To design a car. | B.To name a special machine. |
C.To show the future world in a story. | D.To show a futuristic invention with a picture. |
A.Mike, aged 9; Tony, aged 8. | B.Linda, aged 15; Susan, aged 17. |
C.Dave, aged 12; John, aged 13; Lucy, aged 14. | D.Jenny, aged 10; Kate, aged 10; Alan, aged 16; Bill, aged 16. |
A.The invention can be not fun but helpful. | B.The competitors can send their works on October 16. |
C.If you want to know more, click prize@nosycrow.com. | D.The winner of the competition will get a robot and some money. |
【推荐1】As we know, one of the great challenges for students is taking tests. The students must do well in the test to advance(进步). A student who hits the books spends long hours preparing for a test.
Students read all their books carefully, and they make sure they know all the materials the teacher has offered and prepared for every possible question. They study every night. They are “hitting the books”. In the United States, most children begin attending school when they are five years old. Public education is free and most children go to schools near their homes. School life in these early years is fun. The children learn to read and write. But they also play games and go on trips. There is no reason for them to hit the books at such an early age.
This situation changes as children grow older. The subjects become more and more difficult. Students must learn about world history, geography, and the life science. Tests become more common. Pressure is growing to hit the books and advance. However, most students really begin hitting the books for long hours only when they reach high school. High school students who hope to go to college or university must take a special test. called SAT. A high school student who gets a high score in the test has a good chance to enter a top American college. For this reason, many students hit the books for months to prepare for SAT.
All this adds up to a lot of work— “hitting the books”. Knowledge is a prize that is not easy to gain.
1. What does the underlined expression “hits the books” probably mean?A.Throw away books. | B.Study hard on a subject. |
C.Hit desks with books. | D.Take tests with great care. |
A.The children must study hard at an early age. |
B.They need get marks at an early age. |
C.They have reasons to study hard. |
D.Their school life is full of enjoyment. |
A.when they are in primary school | B.when they are in college |
C.after they graduate from high school | D.when they reach high school |
A.want to go to high school | B.are leaving college |
C.want to go to American colleges | D.are learning to read and write |
A.No pains, no gains. | B.Custom makes all things easy. |
C.Actions speak louder than words. | D.All things are difficult before they are easy. |
【推荐2】In ancient (古代) China, people’s names had three parts (部分): their family name, given name and courtesy name (字).
Take Li Bai, a famous Tang Dynasty poet (唐代诗人), as an example. His family name was Li, his given name was Bai, and his courtesy name was Taibai.
People used their given name when they were among family members. But in social (社交的) life, they called each other by their courtesy names to show respect (尊重).
Men would get their courtesy name when they turned 20. It was a symbol of adulthood (成年). Women would get their courtesy name after getting married (结婚).
One’s courtesy name often had something to do with one’s given name. For example, Mencius’ name was Meng Ke. His courtesy name was Ziyu. Both Ke and Ziyu mean “carriage (马车)”. Zhuge Liang’s given name was Liang, which means “bright”. His courtesy name was Kongming, and it means “very bright”.
1. According to the text, Li Bai maybe get the name Taibai ________.A.before he was 20 | B.before he was an adult |
C.when he was 20 | D.when he get married |
A.family members | B.friends | C.workmates (同事) | D.classmates |
A.family name | B.given name | C.courtesy name | D.last name |
A.the family name | B.the given name | C.the father’s name | D.the mother’s name |
A.How ancient Chinese had more than one name. |
B.When ancient Chinese had more than one name. |
C.Where ancient Chinese had more than one name. |
D.Why ancient Chinese had more than one name. |
【推荐3】Now students’ English handwriting (书写) gets worse and worse. That makes their teachers feel worried. Is your English handwriting beautiful? If not, here are four steps that really work!
Use paper with lines
Using paper with lines can keep you writing straight instead of up or down when you write English words or sentences. Those lines on the paper can help you to write words in the right size. Be sure to fill the lined space completely. And make sure those capital letters are written properly.
Slow down
If your writing is hard to read, try slowing down a little. For some kids, going slower makes the handwriting clear. If you write too fast, it’s hard for you to stop where you should, and even worse, you may make more mistakes.
Hold your pen right
When you hold your pen the correct way, writing is much easier. Some kids press down really hard when they write. That makes the handwriting not nice. Try to be relaxed and don’t hold the pen so hard. Let your writing appear nice and clean. If you do so, people will guess you are a student with a good habit.
Draw more pictures
Drawing can improve your handwriting. You need to use the skills to control your pen better when you are drawing pictures. Even though you have no chance to draw at school, you can practice by yourself at home.
Handwriting is very important. Imagine you are a world-famous movie star or a well-known sports player, what do you do when your fan run up to you? Give them your signatures (签名), of course!
1. How many pieces of good advice does the passage give us?A.One. | B.Two. | C.Three. | D.Four. |
A.Happy. | B.Worried. | C.Sad. | D.Amazing. |
A.Good Handwriting Needs a Good Pen | B.Using Paper in Line |
C.Making Your English Handwriting Perfect | D.No Handwriting without Drawing |