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How many stars in space exactly? – Masonic, Brooklyn, Massachusetts
Look for the sky on a clear night, and you will see thousands of stars – about 6000 or so.
But this is only a small part of all the stars there. The rest is very far away for us to see them.
The universe, galaxies, stars
After astronomers gay Find out how to estimate the total number of stars In the universe, which is all that exists.
Waster throughout the universe Galaxies Groups of stars, planets, gas and dust together.
Like people, galaxies are varied. They come in different sizes and shapes.
Earth in milky wayA spiral galaxy. Its stars combine the spiral weapons that revolve around the Galaxy Center.
Other galaxies elliptical -Some of the eggs-and some of them irregularWith a variety of shapes.
Count galaxies
Before calculating the number of stars in the universe, astronomers must first estimate the number of galaxies.
To do this, they take very detailed pictures of small parts of the sky and calculate all the galaxies they see in those pictures.
Then this number is hit with the number of pictures needed to photograph the entire sky.
Answer: There is something
Count
Astronomers do not know exactly the number of stars in each of these galaxies 2 trillion. Most of them are very far away, there is no way to tell them accurately.
But we can be gone good in the number of stars in our Milky Way. These stars are also varied, and come in a wide range of sizes and colors.
Our sun, a white star, is medium -sized, medium in weight and medium hot: 27 million degrees Fahrenheit in its center (15 million degrees Celsius).
The largest, heavier and hottest stars tend to be blue, like Vega In the constellation of Lira. The smaller and lighter stars are red Proxima Centauri. Except for the sun, it is our closest star.
Incredible
Red, white and blue stars give different amounts of light. By measuring the light of stars – specifically, his knowledge and astronomical science can estimate the number of stars that our galaxy holds.
With this method, they discovered that the Milky Way has about 100 billion stars – 100,000,000,000.
Now the next step. Using the Milky Way method as our model, we can double the number of stars in a typical galaxy (100 billion) through the number of galaxies in the universe (2 trillion).
The answer is a very amazing number. There are approximately 200 billion trillion star in the universe. Or, to put it in another way, 200 Sextillion.
This is 200,000,000,000,000,000,000!
The number is very big, it is difficult to imagine. But try this: It is about 10 times the number of water cups in all the ground oceans.
Think about that the next time you look at the night sky – then I wonder about it What may happen on trillion worlds All of these stars revolve.
Hello, curious children! Do you have a question you want an expert? I ask a very person to send your question to Uciouskidsus@theconversion.com. Please tell us your name, age, and city in which you live.
Since curiosity does not have the maximum age – adults, he told us what you also wonder. We will not be able to answer every question, but we will do our best.
This article has been republished from ConversationAn independent, non -profit news organization brings you facts and trusted analysis to help you understand our complex world. Written by: Brian Jacksonand Boys State University
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Brian Jackson receives funding from NASA.
