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By radioactive dating, the age of the earth is 4.5 billion years, so the age of the sun is 4.51 billion years
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Under the action of gravity, they formed a stellar system, which has evolved into the universe today
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In history, they were mistakenly regarded as nebulae
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Scientists believe that it originated from an incredible big bang 13.7 billion years ago
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What is a galaxy? How many galaxies and stars are there in the universe? Most of the light spots in the sky are stars of the Milky way, but there are also a large number of luminescent bodies which are huge star groups similar to the Milky way
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The mass released by the Big Bang is floating in the space, and the huge galaxy composed of many stars is made up of these materials
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The error is about 10 times
There are about 500 stars formed in the last 10 million years, and of course there are thousands of star forming nebulae
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The center of the galaxy and the four spiral arms are places where stars are concentrated
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In the Milky way, most of the stars are concentrated in a flat sphere, which is shaped like a discus
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From the perspective of the evolution of the universe, they are more basic than stars
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The diameter of the discus is 100000 light-years, equivalent to 9460800 billion kilometers
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It will take 12 billion to 15 billion years for light from the edge of the universe to reach the earth
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As for the age of the Milky way, the prevailing view is that the Milky way was born shortly after the big bang of the birth of the universe
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One second after the big bang, it dropped to 10 billion degrees
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This is an unimaginable energy explosion
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There are about 80-125 billion galaxies in the universe, with 80 trillion stars
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The galaxy as a whole has a poor rotation, with the sun on a spiral arm called the Orion Arm, about 25000 light-years from the center of the galaxy
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How many stars are born in the Milky way every year? The Milky way has a history of about 12 billion years, during which about 700 billion stars have been formed, that is, more than 50 stars are born every year
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Cosmology holds that the universe we observed, in its early stage of gestation, concentrated on a singularity with extremely small volume, extremely high temperature and extremely high density
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Some people calculate that there are 500 trillion stars, which is no more than 6 times the actual situation
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So if you do a simple math problem, it’s not hard to know how many stars there are in the universe that we have observed
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The middle part of the nucleus ball is called “silver nucleus” and the four sides are called “silver plate”
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The temperature keeps falling and the atoms keep forming
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We call them extragalactic galaxies
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20 trillion to 40 trillion (some have also launched 80 trillion to 500 trillion)
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What is the universe? How big is the universe? What is the age of the universe? The universe is the general name of all things, the unity of time and space
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There is a larger sphere outside the silver plate, where there are fewer stars and less density, known as the “silver halo”, with a diameter of 70000 light-years
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Next came the big Magellanic Cloud, 159000 light years away, and the wheat Magellanic Cloud, 189000 light years away
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If the number of stars in the Milky way is calculated at a minimum of 200 billion (it is estimated to be 100 billion), the number of stars in the universe can be calculated as 2 × 1022~4 × 1022, i.e
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The protruding part in the middle of the oblate sphere is called the “nuclear sphere”, with a radius of about 7000 light-years
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According to the latest observation data, the farthest galaxy that has been observed is 13 billion light-years
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The age of the sun and the earth? It is estimated that the age of the sun is 10 million to 2000 years older than that of the earth
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How many stars are there in the Milky way? How many times the mass of the Milky way is that of the sun? How many stars are there in the universe? About 90% of the Galactic material is concentrated in stars, and there are also gas and dust in the galaxy, which accounts for about 10% of the total mass of the galaxy
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How many galaxies are there in the universe? How many stars are there in each galaxy? In this spherical space with a radius of 13 billion light years, about 125 billion galaxies have been discovered and observed, and each galaxy has tens of billions to trillions of stars like the sun
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The sun is about 23000 light-years away from the silver center, and it orbits the silver center at a speed of 250 km / s, with a cycle of 250 million years
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After that, the matter diffuses rapidly and the temperature decreases rapidly
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From a distance, the galaxy looks like a discus for physical exercise
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Its main part is projected on the celestial sphere, which is called the Milky way in China
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The rotation speed and period of each part vary with the distance from the silver center
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The main forms of matter are electrons, photons and neutrinos
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How far is the earth from the center of the galaxy? The earth is about 25000 light-years away from the center of the galaxy, with an error of 1600 light-years.
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The universal existence of galaxies shows that they represent a level in the structure of the universe
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Our sun is one of these countless stars
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In 1971, British astronomers Linden bell and Martin ness analyzed the infrared observation and other properties of the central region of the Milky way and pointed out that the energy source of the central region of the Milky way should be a black hole, but there is no conclusive evidence for massive black holes
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The total mass of all stars in the galaxy tends to be 700 billion solar masses
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How did the language universe come into being? 1
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And the scientific community thinks that the “Big Bang” of the birth of the universe happened about..
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The total mass of our galaxy is about 1 trillion times that of our sun, about 10 times that of all the stars in our galaxy
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Originally, people imagined that the universe would not expand because of gravity, but scientists have found that there is a kind of “dark energy” in the universe that can produce a repulsive force to accelerate the expansion of the universe
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In other words, if a beam of light is emitted from the galaxy at a speed of 300000 kilometers per second, it will take 13 billion years to reach earth
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Using this method, we can calculate that the age of our Milky way is about 14.5 billion years old, with an error of more than 2 billion years
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How does the galaxy work? How many years does the sun orbit the Milky way? What is the age of the galaxy? The Milky way is a giant spiral galaxy, Sb type, with four spiral arms
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It contains one or two hundred billion stars
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0.01 seconds after the big bang, the temperature of the universe is about 100 billion degrees
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14 seconds after the big bang, the temperature was about 3 billion degrees
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According to the Big Bang Universe model, the age of the universe is about 20 billion years
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The thickest part in the middle is about 3000-12000 light years
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Introduction to the Milky way is the galaxy to which the earth and the sun belong
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About 14.1 billion years ago, the big bang happened after the singularity, which started the birth history of our universe
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In such a vast universe, the earth is just like a drop in the ocean
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There are four spiral arms extending symmetrically from the center of the galaxy
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According to calculation, the average mass of a star is 0.7 times that of the sun, so 700 billion solar masses means 100 billion stars
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There are 100 billion to 200 billion galaxies like the Milky way in the universe
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35 seconds later, it was 300 million degrees, and the chemical elements began to form
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The famous fairy galaxy and Magellanic nebula are extragalactic galaxies visible to the naked eye
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Which galaxies are closest to the Milky way? The humanoid dwarf galaxy is the closest, about 78200 light-years away
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The Milky way is a spiral galaxy with a spiral structure, that is, a silver center and two spiral arms, 4500 light-years apart
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The universe is filled with clouds of gas
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Now we know that there are more than 100 billion galaxies
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