Tech UPTechnologyThe most surprising facts about the universe

The most surprising facts about the universe

From the perspective of an earthling, outer space is an area that is about 100 kilometers above our planet, where there is no appreciable air to breathe or scatter light. In this area, blue gives way to black because oxygen molecules are not abundant enough to make the sky blue.

Also, space is a great vacuum, which means that sound cannot be transmitted because the molecules are not close enough to be able to transmit it . However, that does not mean that the space is empty. Gas, dust, and other particles of matter float around the “emptiest” areas of the universe, while the most populated regions can host planets, stars, and galaxies.

Nobody knows exactly how big the space is. The difficulty arises because of what we can see in our detectors. We measure long distances in space in “light years”, which represent the distance it takes for light to travel in one year (approximately 9.3 trillion kilometers).

From the light that is visible in our telescopes, we have mapped the galaxies that nearly reached the Big Bang, which is believed to have started our universe 13.7 billion years ago. This means that we can “see” in space at a distance of almost 13.7 billion light years. However, astronomers are not sure if our universe is the only one that exists, which exposes that space could be much larger than it appears to us.


To understand the immensity of the cosmos, the book by Mariano Abril Domingo (military geodest, civil engineer and doctor in construction) entitled “225 questions about the nature of the universe” (Editorial Marcombo) is a fantastic place to stop and refuel to read about everything around us, from atoms to galaxies. This popular science book aims to get closer to the general public; first of all curious, but not an expert through explanations about the nature of the universe with all those questions that “he always wanted to know, but never dared to ask.”


We discover some of the mysteries of the universe contained in this book.


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