Say hello to Changesite-（Y）— the sixth new lunar mineral（月球矿物）!

Chinese scientists found it in moon samples（样品）brought back by the Chang’e 5 lunar probe in December 2020. It has become the first lunar mineral found by Chinese scientists, making China the third nation in the world, after the United States and Russia, to have achieved such a success, reported China Daily.

Changesite-（Y）looks crystal（晶莹的）clear like a diamond. But its chemical content is different from any other known mineral.（A）It has a high level of rare earth（稀土）, reported China Science Daily. Li Ziying, chief scientist of the lunar sample research, said that the finding of this new mineral will help researchers study the history and physical traits（特征）of the moon. The value of the rare earth in（B）it will also be studied.

（C）Besides the new mineral, scientists also measured the content（含量）of helium-3（氦-3）from the Chang’e 5 samples. Helium-3 is a valuable fuel（燃料）that can provide safer nuclear energy（核能）. It is not radioactive（放射性的）and would not produce dangerous waste. On Earth, we have only 15 to 20 tons of helium-3 that can be used. But after studying the moon’s soil, scientists said there could be at least 1 million tons of helium-3 on the moon. That’s enough for all people on Earth to have clean energy for 10,000 years!

2 . It’s 2050. The Earth is dying, and moving to Mars seems to be the only way out for humans. A team of American astronauts begin to search on Mars. This is what the movie Red Planet begins with. Known as the Red Planet, Mars is the favorite of writers and filmmakers. Mars is the fourth planet from the Sun and the next planet beyond the Earth. Mars is the only planet whose surface can be seen from the Earth. It is about half size of our planet.

The surface of Mars is more like the Earth than any other planet. But it is further from the Sun than the Earth, so temperatures on Mars are much lower. Plants and animals can not live now on Mars. But many scientists still believe that life may have been on Mars long ago. On 6th August,1996, scientists discovered a piece of rock from Mars, which fell to the Earth 13,000 years ago. Ten years later, some scientists still didn’t accept that there was life on Mars. People may not be sure about life on Mars until a sample(样本) of life is brought back. Some further researches are being done in many countries.

3 . People around the word felt excited on the night of April 10, 2019. For the first time in history, people saw a photo of a black hole. The photo became popular at once. But do you know it has something to do with a computer scientist Katie Bouman. Without her, there won’t be this photo.

Black holes are very far from us, so it is very difficult to take photos of them. It’s like taking a photo of an orange that is on the moon. Many scientists had tried. However, none of them succeeded.

These failures didn’t stop Bouman from trying. Several years ago, she started working on a special computer program. During the part years, she has improved the program many times. Finally, it turned telescope data (望远镜数据) into a photo of a black hole.

Bouman has received lots of praise because of her work. The young woman, however, is modest. She said the success mainly depends on her team. “None of us could do it alone,” she said.

Would you like to make history as Bouman did? Set a goal for yourself and work hard at it. Maybe you will make it come true in the future.

5 . Maybe you know a lot about the city you live in. You may even know some interesting facts about earth, but ________ do you know about Mars? Will there be ________ there just like people on Mars?

Mars is the fourth planet from the sun and it’s the most like earth, but it’s much ________ than earth because it’s farther from the sun. It’s also the only planet whose surface can be ________ from earth.

Mars is often called “the red planet” because the rocks on it have a dark ________ color. There are strong winds on Mars that can ________ dust into the hills. For many years, people have ________ Mars. They have sent instruments and robots there. Some of the robots got there, ________ most failed. NASA(美国国家宇航局) sent two robots to Mars two years ago. They wanted to ________ signs of water and life on Mars. Some day, humans will travel to Mars and have an even ________ look at our red neighbor. Maybe it could be you!

6 . Our Future in Space

Many people believe that one day, we may leave the Earth to make our home among the stars. At that time, many people, including you, might live in a space station 200 miles above the Earth.

Space Cities

There will be cities like the one we are living in now.     1     Hundreds, or even thousands, of people will live, work and go to school there.

In fact, we have explored(探索) part of the Moon, and even sent spaceships to the surface of Venus and Mars.     2    

Go into Space

The Moon is full of valuable metals. These metals—if we got them—could be used to build factories and space stations.     3     In that case, more energy can be turned into electricity—for creating comfortable living conditions.

From space, too, we can look down on the Earth and study the atmosphere, its weather, and the influence of air pollution to save it.

At Home in Space

    4     For example, we have to protect ourselves from the ultraviolet(紫外线) because it can give us bad sunburns. Besides, our bones(骨头) will become weaker if we stay out in space for a long time. But we’ll surely find out the solution.

Yet, these risks won’t keep people from going into space.     5     And people will live there with many different interests—medicine, farming, teaching and so on.

The next hundred years will be filled with other worldly adventures, exciting scientific discoveries, and danger, as humans leave the Earth—perhaps forever.

8 . In 2080, the Earth is dying, and moving to Mars seems to be the only way out for mankind. A team of American astronauts begin to search on Mars. This is what the movie Red Planet begins with. Known as Red Planet Mars is popular with science fiction(小说) writers and filmmakers.

Mars is the fourth planet from the Sun. We can see the surface of Mars from the Earth. It is half the size of our planet. The rocks, soil and sky have a red or pink hue(色调). The red color was observed by star-gazers throughout history. The ancient Romans named the planet “Mars” after their god of war because of its red color. The ancient Egyptians named it “Her Descher” meaning the red one.

The surface of Mars is more like the Earth than any other planet. However, because it is farther from the Sun than the Earth, temperatures on Mars are much lower. Most of the time the temperatures are far below freezing. The average temperature on Mars is -63℃ with a highest temperature of 20℃ and a lowest of -140℃. Plants and animals could not live now on Mars.

However, many scientists believe that such life may have existed long ago. On 6th August, 1996, scientists discovered a piece of rock from Mars. It fell to the Earth 13,000 years ago, and evidence of simple fossil creatures has been found in it. However, some scientists still don’t accept that there was life on Mars. People may not be so sure about life on Mars until a sample(样本)of life is brought back