Since we were little we heard a lot about the Universe and, maybe, the first thing that comes to you
mind is that it is something very big. The question now is what does something "big" mean to us? Maybe in our childhood a wheel of fortune, an elephant or a skyscraper made us big. It is unlikely that, according to our everyday experiences, we can really realize the scale of sizes and distances between objects that make up the Universe. And this even if we restrict ourselves to 4.9% that is composed of ordinary matter-such as atoms quarks, etc.-that we know. Remember that the remaining 95.1% is made up of material and dark energy that we still do not know exactly what it is.
Life emerged on this planet 4 billion years ago, but humans have only sent radio signals to space since just 100 years ago, since the days of Marconi. That means there is an expanding bubble of such signals announcing the presence of humans in our galaxy, whose extent is not so small. But the question is how much is "big" or "small" relative to the size of our galaxy. We can see this in the following video created by the American Museum of Natural History that shows us the different scales and things that we have discovered of the universe until now. We hope you like.
