Galaxy in which tool dependencies are stored

What is a galaxy? Simply explained for children

What a galaxy is is pretty easy to explain. A look at the night sky helps to understand. Imagining the size of a galaxy, on the other hand, is much more difficult.

What is a galaxy? Simply explained for children

A galaxy is also called the Milky Way.

  • If you look at the sky on a cloudless night, you can see parts of the galaxy in which we live. A galaxy is a collection of stars.
  • A galaxy consists of numerous stars, i.e. suns. Our sun is just a single star in our galaxy. This also includes tons of planets orbiting a sun, such as our planet, the earth.
  • So different suns shine in the night sky. These also illuminate planets so that they can also be seen, although they themselves do not emit light.
  • A galaxy is huge, it contains billions of stars. These stars all revolve around the center of a galaxy. These orbits of the stars around the center form a disc that rotates. So a galaxy is usually spiral shaped. A black hole forms the center of a galaxy.
  • However, there are also other shapes, such as elliptical galaxies or irregular galaxies, in which the stars are clustered together without any particular structure.

A galaxy has unimaginable dimensions

Our earth is just a tiny point in our galaxy.

  • As already mentioned, a galaxy consists of billions of suns. In an average-sized galaxy, there are around 100 billion stars.
  • The Milky Way we live in is approximately 100,000 light years across. For a better understanding: a light year is roughly equivalent to 9.5 trillion kilometers.
  • How many galaxies there are in total is not known exactly. The universe is too big for us to know it completely. It used to be assumed that there were around 100 billion galaxies. However, after evaluating the information gathered by the Hubble telescope, it was concluded that this number is only a tenth of the actual number. So it is now believed that there are more than a trillion Milky Ways.
  • If you put the size of the universe in relation to our galaxy, it is only a small point in the entire universe. If you also consider that our sun is only one of 100 billion other suns in our Milky Way, the dimension may not be easier to imagine, but it is clearer.
  • If you are now wondering about the size ratio between our sun and the earth, in the next article we will explain how often the earth fits into the sun.

Many people ask themselves this question: Are there noises in space? You can find the answer to that in our next article.