Distances: Crash Course Astronomy #25

2024/05/0305:24:04 science 1896412

Distances: Crash Course Astronomy #25 - DayDayNews

Distances: Crash Course Astronomy #25 - DayDayNews

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A strange crystal that scientists have never seen before. Strange crystals under an electron microscope. Taskaev On February 15, 2013, a mysterious fireball streaked over Chelyabinsk in southern Russia. According to estimates, scientists believe that this is an asteroid with a di - DayDayNews

A strange crystal that scientists have never seen before. Strange crystals under an electron microscope. Taskaev On February 15, 2013, a mysterious fireball streaked over Chelyabinsk in southern Russia. According to estimates, scientists believe that this is an asteroid with a di

Nine years after a mysterious fireball fell in Russia, scientists discovered something strange there

05/16 1818

Jeffrey Sachs, chairman of the Lancet COVID-19 Committee, said: The new coronavirus does not have any natural origin. Rather, it was produced in an accident in a US biotechnology laboratory. - DayDayNews

Jeffrey Sachs, chairman of the Lancet COVID-19 Committee, said: The new coronavirus does not have any natural origin. Rather, it was produced in an accident in a US biotechnology laboratory.

Chairman of the Lancet COVID-19 Committee: The virus may have originated in a US biological laboratory

05/16 1693

The earth's temperature is rising, extreme weather conditions are increasing, green vegetation is decreasing, the ecology has been damaged, and wild animals are facing the risk of extinction. - DayDayNews

The earth's temperature is rising, extreme weather conditions are increasing, green vegetation is decreasing, the ecology has been damaged, and wild animals are facing the risk of extinction.

We are familiar with “environmental protection”, but what is its specific connotation? What should we do about it?

05/16 1713

During the Cold War period after World War II, mankind began a race to develop nuclear weapons, and the United States and the Soviet Union gained the power to destroy the earth. So what would happen if a nuclear bomb was detonated in the Marianas Trench? . The deepest place on Ea - DayDayNews

During the Cold War period after World War II, mankind began a race to develop nuclear weapons, and the United States and the Soviet Union gained the power to destroy the earth. So what would happen if a nuclear bomb was detonated in the Marianas Trench? . The deepest place on Ea

What would happen if a nuclear bomb was detonated at the deepest point on earth?

05/15 1828

When a meteorite falls into the earth, it will rub against the earth's atmosphere and burn. If the meteorite is large enough, we will be able to see a flying fireball. In this case, if we throw a raw egg down while flying on an airplane, will it turn into a mature egg when it lan - DayDayNews

When a meteorite falls into the earth, it will rub against the earth's atmosphere and burn. If the meteorite is large enough, we will be able to see a flying fireball. In this case, if we throw a raw egg down while flying on an airplane, will it turn into a mature egg when it lan

If you drop an egg from an airplane, will it be cooked when it hits the ground? I can't eat it anyway

05/16 1552

Millions of years ago, a group of apes gathered together on the African continent. They were no longer frequent visitors in the trees, but instead galloped on the grasslands. Like most predators, they began to pursue prey. Of course, human civilization at that time It has not yet - DayDayNews

Millions of years ago, a group of apes gathered together on the African continent. They were no longer frequent visitors in the trees, but instead galloped on the grasslands. Like most predators, they began to pursue prey. Of course, human civilization at that time It has not yet

Russian fishermen accidentally salvaged a "chip" from 250 million years ago. Is the earth's civilization recycling?

05/15 1400

As living conditions improve day by day, more and more families own cars as a means of transportation. At the same time, tens of millions of cars are scrapped every year, along with a large number of discarded car tires. We all know that car tires are rubber products, similar to - DayDayNews

As living conditions improve day by day, more and more families own cars as a means of transportation. At the same time, tens of millions of cars are scrapped every year, along with a large number of discarded car tires. We all know that car tires are rubber products, similar to

How to deal with the tens of millions of scrapped tires every year? Study finds used to pave roads to make them stronger and more heat-resistant

05/15 1915

Hello, everyone, this is the Yi Nao Cloud Research Circle, I am Qiuqiu~ As we all know, the replicability of research is crucial. - DayDayNews

Hello, everyone, this is the Yi Nao Cloud Research Circle, I am Qiuqiu~ As we all know, the replicability of research is crucial.

Dry information | fMRI standard reporting guidelines are newly released, come and increase your knowledge

05/15 1062

The imagination of the masses is the art of creation, and it is also the shackles of self-improvement. In 1981, Hilary Putnam put forward a conjecture in "Reason, Truth, and History": A person's brain was cut off from the body and put into In a tank containing a nutrient solution - DayDayNews

The imagination of the masses is the art of creation, and it is also the shackles of self-improvement. In 1981, Hilary Putnam put forward a conjecture in "Reason, Truth, and History": A person's brain was cut off from the body and put into In a tank containing a nutrient solution

Metaverse - "the ultimate dream" or "just a fantasy"?

05/16 1970

With the development of medical technology, people have discovered a helpless fact, that is, the average life span of human beings has increased, but the limit of human life span has not been broken through. - DayDayNews

With the development of medical technology, people have discovered a helpless fact, that is, the average life span of human beings has increased, but the limit of human life span has not been broken through.

Cracking the aging code: New genetic discoveries are expected to increase the average human life span from 80 to 400 years

05/15 1226

Text and photos/Yangcheng Evening News all-media reporter Ouyang Zhiqiang Correspondent Huo Erman Sponsored by China Electronics Society, Intelligent Human-Computer Interaction Expert Committee of China Electronics Society, Aerospace Medical Engineering and Space Biology Professi - DayDayNews

Text and photos/Yangcheng Evening News all-media reporter Ouyang Zhiqiang Correspondent Huo Erman Sponsored by China Electronics Society, Intelligent Human-Computer Interaction Expert Committee of China Electronics Society, Aerospace Medical Engineering and Space Biology Professi

The Second Annual Conference on Intelligent Human-Computer Interaction Technology will open in Foshan on July 8

05/17 1830

"What are humans doing? They discharge so much sewage! The fish are all affected." "Why do humans pursue progress and development? Human beings are very selfish when they only think about themselves." "Why don't humans let other animals manage the earth?" Early in the morning, th - DayDayNews

"What are humans doing? They discharge so much sewage! The fish are all affected." "Why do humans pursue progress and development? Human beings are very selfish when they only think about themselves." "Why don't humans let other animals manage the earth?" Early in the morning, th

Cognition｜What are humans doing?

05/17 1200

pixabay.com State-owned enterprises have stepped out of the "high wall" to promote the scientific and technological achievements they have developed to the society. - DayDayNews

pixabay.com State-owned enterprises have stepped out of the "high wall" to promote the scientific and technological achievements they have developed to the society.

China National Nuclear Corporation joins hands with the national technology market to promote the latest scientific and technological achievements to the society

05/17 1402

Recently, China Forestry Press held a symposium on the theory and technology of grassland ecological restoration and a new book launch of "Main Technical Models of Ecological Restoration of Degraded Grassland". - DayDayNews

Recently, China Forestry Press held a symposium on the theory and technology of grassland ecological restoration and a new book launch of "Main Technical Models of Ecological Restoration of Degraded Grassland".

Commissioned by the National Bureau of Investigation, this major achievement was officially released! It is the first time in the country for an academician to write a preface!

05/17 1924

1. When did cats start to look like this? 2. “This is what an artichoke would look like if you let it bloom.” 3. “A large group of turtles sunbathing on a floating tree trunk” 4. “The passion vine bloomed this morning!” 5. “These two strawberries grew With a pair of happy feet.” - DayDayNews

1. When did cats start to look like this? 2. “This is what an artichoke would look like if you let it bloom.” 3. “A large group of turtles sunbathing on a floating tree trunk” 4. “The passion vine bloomed this morning!” 5. “These two strawberries grew With a pair of happy feet.”

19 photos of natural beauty that will completely mesmerize you

05/17 1539

Text | Science Wormhole animals reproduce through mating, but their pairing forms are diverse and can be divided into relatively rare monogamy (monogamy) and mixed mating. The mixed system also includes polygamy, polyandry, and polyandry. As we all know, animals mate in order to - DayDayNews

Text | Science Wormhole animals reproduce through mating, but their pairing forms are diverse and can be divided into relatively rare monogamy (monogamy) and mixed mating. The mixed system also includes polygamy, polyandry, and polyandry. As we all know, animals mate in order to

"Monogamous" animals, if one partner dies, can they withstand the temptation of mating?

05/17 1119

"People live up to the green mountains, and green mountains never live up to people." This sentence is also aptly applied to the Yangtze River. The Yangtze River is one of the seven rivers with the highest biodiversity, with more than 4,300 biological species, making it an "ecolo - DayDayNews

"People live up to the green mountains, and green mountains never live up to people." This sentence is also aptly applied to the Yangtze River. The Yangtze River is one of the seven rivers with the highest biodiversity, with more than 4,300 biological species, making it an "ecolo

The Yangtze River’s “big experiment”: A large number of fish eggs appear in Yidu, and the flood peak of the Three Gorges Reservoir is effective?

05/17 1072

As we all know, our country has four sea areas, namely the Bohai Sea, the Yellow Sea, the East China Sea and the South China Sea. The most special sea area among these four sea areas is undoubtedly the Bohai Sea in our country. - DayDayNews

As we all know, our country has four sea areas, namely the Bohai Sea, the Yellow Sea, the East China Sea and the South China Sea. The most special sea area among these four sea areas is undoubtedly the Bohai Sea in our country.

Foreign ships have no right to trespass! The Bohai Sea can become an inland sea, thanks to Chairman Mao and the island of Shandong

05/17 1908

In order to gather the strength of the industry, give full play to the advantages of the industry, continue to promote the industry to actively serve rural revitalization, fulfill social responsibilities, and further implement the "one company, one county" paired assistance work. - DayDayNews

In order to gather the strength of the industry, give full play to the advantages of the industry, continue to promote the industry to actively serve rural revitalization, fulfill social responsibilities, and further implement the "one company, one county" paired assistance work.

Lixin County, Bozhou City joins hands with capital market to promote rural revitalization

05/17 1450

Today, the development of the Chinese fast food industry has penetrated into every aspect of our lives. With the development of the economy and the acceleration of the pace of life, both young white-collar workers and students cannot do without fast food. Many entrepreneurs have - DayDayNews

Today, the development of the Chinese fast food industry has penetrated into every aspect of our lives. With the development of the economy and the acceleration of the pace of life, both young white-collar workers and students cannot do without fast food. Many entrepreneurs have

What is the development prospect of the Chinese fast food industry? Three major trends point the way

05/17 1673

Yuyuan: When we were working together, we discussed stocks. On this point, I admire you very much. You have a clear understanding of yourself, know what you are suitable for, what you can do well, and you are not greedy. - DayDayNews

Yuyuan: When we were working together, we discussed stocks. On this point, I admire you very much. You have a clear understanding of yourself, know what you are suitable for, what you can do well, and you are not greedy.

My love letter - to Yuyuan (8): The bull market may be on the way

05/17 1686

Sawing and milling machines, also known as cutting machines, are mainly designed to achieve one-time cutting of shapes. If it is easy to cut straight materials, or the minimum curvature does not exceed 60mm, a band saw can be used. However, If the curvature is too small, it canno - DayDayNews

Sawing and milling machines, also known as cutting machines, are mainly designed to achieve one-time cutting of shapes. If it is easy to cut straight materials, or the minimum curvature does not exceed 60mm, a band saw can be used. However, If the curvature is too small, it canno

Special article on sawing and milling machines for CNC woodworking machinery_CNC sawing and milling machines_published by Huazhou CNC

05/17 1931