A new study, published in the prestigious journal Astrophysical Journal, makes a fantastic claim. The number of galaxies in the universe is ten times higher than we thought so far. As minimum. To the eye of a good Cubero, we are talking about 2 billion galaxies.
Observing The “invisible.”
There are two ways to achieve it. On the one hand, we can try to keep the sky as far as possible, to see all the galaxies that we find, and then add all the galaxies that we can find in a volume of any space.If we observe these galaxies with care, we can group them according to their size. Of course, on the other hand, that amount changes with distance.Galaxies began to form only a few hundred million years after the formation of the universe, and many of them were small. With the passage of time, they merged to form more massive galaxies (such as the Milky Way). So we have to carefully count how many galaxies there are in the volume of space up to a distance X from us, and then do the same for other, more distant regions, and so on.
That we do not see 90% of the galaxies in the universe does not mean that we have the explanation for dark energy. We know that it is not composed of any normal matter, such as that which is part of stars, planets, and people. These galaxies are incredibly far away, but stars, gas, and dust from them precisely like the galaxies that we find here. They are just very dim.