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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Which galaxies are closest to the Milky way? The Sagittarius dwarf galaxy is the nearest, about 78200 light-years away

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Through radiometric 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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14 seconds after the big bang, the temperature was about 3 billion degrees

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The total mass of all stars in the Milky Way tends to think that there are 700 billion solar masses

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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

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The universe is filled with gas clouds

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The famous fairy galaxy and the large and Small Magellanic nebula are extragalactic galaxies visible to the naked eye

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The sun is located on a spiral arm called the Orion Arm, about 25000 light-years from the center of the Milky way

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How far is the earth from the center of the Milky Way galaxy? The earth is about 25000 light-years away from the center of the Milky Way galaxy, with an error of 1600 light-years.

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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 gas and dust in the galaxy, which accounts for about 10% of the total mass of the galaxy

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Calculated by this method, 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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Next are the Large Magellanic Cloud, 159000 light-years away, and the wheat Magellanic Cloud, 189000 light-years away

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According to the latest observation data, the farthest galaxy from us has been observed is 13 billion light-years

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There is a larger sphere outside the silver disk, where there are few stars and low density

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During this period, about 700 billion stars have been formed, that is, the rate of star birth is more than 50 every year

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The Milky way is a spiral galaxy with a spiral structure, that is, it has a silver center and two spiral arms, which are 4500 light-years apart

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If the number of stars in the Milky Way galaxy is calculated at the lowest 200 billion (it is estimated to be 100 billion), the number of stars in the universe is 2 × 1022~4 × 1022, i.e

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   Pay attention to yuehang and Hangzhou! How did the universe come into being? 1

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In other words, if a beam of light is emitted from the galaxy at the speed of 300000 kilometers per second, it will take 13 billion years to reach the earth

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Therefore, as long as you do a simple mathematical problem, it is not difficult for you to understand how many stars there are in the universe we have observed

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There are about 80 billion to 125 billion galaxies and 80 trillion stars in the universe, with an error of about 10 times

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How does the Milky way work? How many years does the sun go around the Milky way? What is the age of the Milky way? The Milky way is a giant spiral galaxy, Sb type, with four spiral arms

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It contains 100 billion or 200 billion stars

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Our sun is one of these countless stars

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Scientists believe that it originated from an incredible big bang 13.7 billion years ago

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The center of the Milky way and the four spiral arms are places where stars are dense

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The earth is a drop in the ocean in such a vast universe

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The protruding part in the middle of the flat sphere is called the “nuclear sphere”, with a radius of about 7000 light-years

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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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The universal existence of galaxies shows that they represent a level in the structure of the universe

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Originally, people imagined that the universe would not expand due to gravity, but scientists have found that there is a “dark energy” in the universe that will produce a repulsive force to accelerate the expansion of the universe

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Some people calculate that it is 500 trillion stars, which is no more than 6 times the actual situation

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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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Because its main part is projected on the celestial sphere, the bright band is called the Milky way in China

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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 and the unity of time and space

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The total mass of the Milky way is about 1 trillion times the mass of our sun, about 10 times the total mass of all stars in the Milky way

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The sun is about 23000 light-years away from the silver center and runs around the silver center at a speed of 250 km / s, with a cycle of about 250 million years

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We call them extragalactic galaxies

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About 14.1 billion years ago, the big bang occurred after the singularity, which began the birth history of our universe

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In history, they were mistaken for nebulae

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Now it is known that there are more than 100 billion galaxies

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The main forms of matter are electrons, photons and neutrinos

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The middle of the nuclear ball is called “silver core” and the surrounding is called “silver plate”

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Fundamentals of Astronomy (I) the age of the sun and the earth? It is estimated that the age of the sun is 10 million-2000 years older than that of the earth

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Cosmology holds that the universe we observed focused on a singularity with extremely small volume, extremely high temperature and extremely high density in the early stage of its gestation

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In the Milky way, most stars are concentrated in a flat sphere, which is shaped like a discus

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The Milky Way rotates poorly as a whole

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About 500 stars have formed in the last 10 million years, and of course there are thousands of star forming nebulae

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The diameter of the discus is 100000 light-years, equivalent to 9460800 billion kilometers

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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 mean 100 billion stars

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Under the action of gravity, they form a stellar system, which has evolved into today’s universe

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From a distance, the Milky Way looks like a discus for physical exercise

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The huge galaxy composed of many stars is composed of these materials

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After 35 seconds, at 300 million degrees, chemical elements began to form

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20 trillion ~ 40 trillion (some people launched 80 trillion ~ 500 trillion)

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There are 100 billion to 200 billion galaxies like the Milky way in the universe

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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 temperature keeps falling and atoms keep forming

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After that, the material diffuses rapidly and the temperature decreases rapidly

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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 found and observed, and each galaxy has tens of billions to trillions of stars like the sun

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One second after the big bang, it dropped to 10 billion degrees

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Introduction to the Milky Way galaxy is the galaxy to which the earth and the sun belong

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From the perspective of cosmic evolution, they are a more basic level than stars

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This is an unimaginable energy explosion

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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 in the central region of the Milky way should be a black hole, but there is no conclusive evidence for a massive black hole at present

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The material emitted by the big bang drifts in space

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The thickest part in the middle is about 3000 ~ 12000 light-years

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It is called “silver halo”, with a diameter of 70000 light-years

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The scientific community believes that the “Big Bang” of the birth of the universe occurred about..

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The Milky way is in a spiral shape, with four spiral arms extending evenly and symmetrically from the center of the Milky way

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What is a galaxy? How many galaxies and stars are there in the universe? Most of the light spots on the sky are stars of the Milky Way galaxy, but a considerable number of luminaries are huge star groups similar to the Milky Way galaxy

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As for the age of the Milky way, the prevailing view is that the Milky way was born soon after the big bang of the birth of the universe

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