How Many Stars Are In The Universe?

How many stars are in our solar system 2019.
How many stars are in our solar system.

What's the total number of stars in the universe?

On occasion, we have all looked up at the sky on a clear, rural night, and we have wondered how many stars there are in the universe if at a glance we already count hundreds of them.

Given the great distance that separates us from these stars, the stellar radiations reach us with years of delay and very faint due to weather distortion. All of this makes the task of censusing the stellar map, which still presents difficulties for astronomers today, very difficult.

A star is a sphere of gas that maintains its shape thanks to the balance between the force of gravity, which contains matter, and the pressure of the plasma, which tends to expand it.

NASA captures explosive outburst of dust, ice and gases from comet 46P/Wirtanen, 2019. from r/Science_Tech_News

How many stars are in our solar system?

Stars do not disperse randomly through space, but as we already know, they are grouped into galaxies. Our mother star, the Sun, belongs to a galaxy called the Milky Way which, according to astronomers, contains between 200 billion and 400 billion stars.

To obtain a universal figure, scientists apply a measurement system similar to that of grains of sand from a long beach; they count the stars in small volume (the Milky Way) and multiply it according to the dimensions and depth of space.

This gives a figure of 10,000,000,000,000,000,000,000,000,000,000 stars. This is only an estimate, since obviously not all galaxies have identical characteristics, just as on a beach not all areas have the same number of grains of sand.

However, according to recent research, the small, faint stars known as "red dwarfs" are much more prolific than previously thought, tripling the number of total stars from 100,000 trillion to 300,000 trillion.


  1. The total number of stars in the universe cannot be estimated because we don't know the size, or if it has one, shape of the universe. There may well be an infinite number of stars whose radiation has yet to reach the outer edge of our visible universe and hence cannot be detected by any means. Or was the question "How many stars can we detect in the visible universe with our current technologies?"


    The comoving distance from Earth to the edge of the observable universe is about 14.26 gigaparsecs (46.5 billion light-years or 4.40×1026 meters) in any direction. The observable universe is thus a sphere with a diameter of about 28.5 gigaparsecs (93 billion light-years or 8.8×1026 meters). Source: › wiki › Observable_universe

    Because we cannot observe space beyond the edge of the observable universe, it is unknown whether the size of the Universe in its totality is finite or infinite. Source: › wiki › Universe


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