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?
time：
2022-05-26 15:42
source：
The Milky way is a giant spiral galaxy,Sb type,with a total of four spiral arms.It contains 100 billion or 200 billion stars.The sun is about 20000 to 30000 light-years away from the silver center,and it rotates around the silver center at a speed of 250 km/s,with a cycle of about 200 to 500 million years.As for the age of the Milky way,the prevailing view is that the Milky way was born soon after the big bang when the universe was born.Using this method,the age of our Milky way is about 14.5 billion years old,with an error of more than 2 billion years.
spiral,arms
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