What is the most important thing about the universe in "knowledge science"?

People are amazed at the tremendous energy generated by the explosion of atomic bombs and hydrogen bombs. However, the energy radiated by the sun per second is about 3.826 10 to the 26th power, which is equivalent to the energy generated by the explosion of hundreds of millions of hydrogen bombs. The sun has existed for billions of years. For billions of years, the sun has released enormous energy. However, in our eyes, the huge energy generated by the sun is very small compared with the Milky Way. A supernova can instantly release the energy generated by the explosion of 10/8 powerful hydrogen bomb, which is equivalent to tens of millions of times the energy of the sun.

The biggest explosion in the universe is the galaxy explosion. According to recent American newspaper reports, not long ago, satellites automatically recorded some data, from which scientists discovered the big bang of a galaxy in space. Although the duration of the explosion is only 0. 1 s, the energy released by it is equivalent to the sum of the energy released by the sun in 3000 years, and it is the most powerful energy explosion in history. Scientists believe that the energy released by this explosion is 1000 billion times greater than that released by the sun. If the earth is in the same huge energy as this explosion, it will vaporize immediately.

Sirius A (Alpha Canis), also known as Canis, is located in Canis. It is the brightest star among 5776 stars that people can see with naked eyes, and its apparent magnitude is-1.46. In the last few days of winter, Sirius will appear just south of the northern hemisphere. Sirius is about 8.64 light years away from the earth, and its brightness is 26 times that of the sun. Sirius has a diameter of 2333485 kilometers and a mass of 4.20 10 to the 27th power ton. Correspondingly, Sirius B is a dim white dwarf companion with a diameter of only 9,655.8 kilometers, but its weight is 350,000 times that of the Earth. It is speculated that Sirius will reach the maximum magnitude of-1.67 in 6 1000, and it will be very bright.

However, according to the observation and calculation of an astronomical team, about 1000 years ago, a star with much higher brightness than Sirius reached the earth when it exploded. This star is 100 times brighter than Sirius. Many countries have made detailed records of this incident. Modern astronomers infer from these historical records that the light emitted by this star was caused by a supernova explosion. They used modern telescopes to observe this area and measured the position of this constant star and its exact distance from the earth.

There are about 1000 billion stars in the Milky Way. Besides the sun, the nearest to our earth is proxima centauri.

Proxima centauri is located in Centauri, about 399.233 million kilometers away from us. Although proxima centauri is closest to us, even the fastest spacecraft needs 6.5438+0.7 million years to make a round trip between the Earth and proxima centauri. Under the existing conditions, it is impossible for human beings to achieve such a "trip". Perhaps only when science really develops to a certain extent will proxima centauri become our "neighbor".

Venus is the brightest planet visible to the naked eye. Venus is very close to the earth, and people often call it the "twin sister" of the earth. This metaphor is very appropriate, because Venus is very similar to Earth in size, mass and external atmosphere. Every morning, people can first see Venus shining in the eastern sky, so it is also called the "morning star".

In the 1960s, after the launch of Venus and Mariner, mankind unveiled the mysterious veil of Venus. It turns out that Venus is not a sunny and vibrant planet as people think, but a planet without living things, because its surface pressure is high and its temperature is high, which is not suitable for living things. Venus has a surface temperature of 480 degrees Celsius, making it the hottest planet in the solar system.

Among the eight planets in the solar system, according to the distance from the sun, Saturn ranks sixth, second only to Jupiter in size and mass, and is a "giant planet".

Saturn is oblate, its equatorial diameter is 9.42 times that of the earth, and the ratio of polar radius to equatorial radius is 0. 192. Saturn's mass is 95.2 times that of the earth, and its volume is 730 times that of the earth. Although Saturn is huge, its density is very small, only 0.7 grams per cubic centimeter. Saturn's core is made of rocks. Outside the core is a shell composed of ice and metallic hydrogen, and the outermost is a colorful cloud belt, which is the most beautiful among the eight planets. Saturn's surface temperature is very low, the highest temperature is-150 degrees Celsius, and Saturn's atmospheric movement is not obvious. Saturn rotates obliquely around the sun at an average speed of 9.64 kilometers per second. Its orbital radius is about 65.438+0.4 billion kilometers, and it takes 29.46 years to go around the sun. Its revolution speed is very slow, but its rotation period on the equator is only 654.38+00 hours and 654.38+04 minutes.

Variable star refers to the phenomenon that a star that was originally very dark suddenly brightens up, which is very common in the star world. There are many kinds of variable stars, and people call the variable star with the most drastic brightness change a "supernova".

1054 The Taurus supernova observed in China is one of the brightest supernovae. The explosion of this supernova was recorded most completely and accurately in China's song "Yao Hui Assemblies". This supernova was so bright when it exploded that people could see its dazzling light during the day. It lasted for 23 days. /kloc-in the 0/8th century, the British first observed the gas shell ejected by this supernova explosion. Seen from the telescope, it looks like a fuzzy cloud. Because its shape is very similar to that of a crab, people call it the "crab nebula".

Shi Gan Xing Jing is the earliest astronomical work in the world. There are two opinions about the author of this work. One thinks that this astronomical work is a collection of astronomical works co-edited by Gander and Shishen during the Spring and Autumn Period and the Warring States Period. Another view is that this book was compiled by people in the Tang and Song Dynasties.

In this book, the author discovered the operating rules of five planets, namely, gold, wood, water, fire and earth, and recorded them in detail. These records about planets have been compiled into the earliest astronomical works in the world, and become the representative of China's outstanding achievements in ancient astronomy. In this book, the author also recorded the observed moon movement, so that people can grasp the periodicity of the moon change.

China is the first country to record solar eclipse in the world. The Oracle Bone Inscriptions unearthed from the Yin Ruins in Anyang, Henan Province recorded the solar eclipse on May 26th, BC 12 17. At that time, people were working in the fields, and suddenly they found a gap in the radiant light, and the light gradually darkened. After a while, the sun slowly began to round again with a gap. This is the earliest reliable solar eclipse record in human history.

Since then, scientists in ancient China have continued to observe and record solar eclipses, maintaining the continuity of solar eclipse records. According to the Spring and Autumn Annals, 37 eclipses occurred from 770 BC to 476 BC. The continuity and scientificity of solar eclipse records provide abundant data for scientific research and form a unique research method. By understanding and summarizing the causes and periodicity of solar eclipse, we can accurately predict solar eclipse, which is also an important achievement in the history of astronomy in China.

China is the first country in the world to discover and record sunspot activities.

There is the earliest sunspot activity record in Hanshu compiled by Ban Gu in Han Dynasty. There is such a passage in Hanshu Wuxing Zhi: "The first year of peace ... ended in March B, and the sunrise was yellow, with black gas as big as money, living in the center of Japan." The words contained in the history books prove that sunspot activity was observed in China as early as the Han Dynasty in 28 BC.

In ancient China, there were not only the earliest sunspot records recognized by the world, but also many detailed records of sunspot activities. From the first year of Heping in Han Dynasty to the end of Ming Dynasty, about 100 sunspot activities with definite dates were recorded. In these records, people recorded the shape, size, position and even changes of sunspots in detail. All these records have become valuable information for us to study sunspot activity and its influence on the earth.

Italian scientist Galileo invented the world's first telescope in 1609. This telescope works on the principle of lens imaging. The convex lens is the objective lens and the concave lens is the eyepiece. When the concave lens and convex lens are adjusted to a suitable distance range, people's eyes can see an upright and enlarged image in the eyepiece.

The telescope invented by Galileo was able to magnify objects dozens of times for observation at that time.

Galileo used his telescope to observe the mountains and valleys on the moon, and found countless stars and other astronomical phenomena in the Milky Way, thus effectively confirming Copernicus's "Heliocentrism". The telescope invented by Galileo provided great help for later astronomers to carry out scientific research.