🌍 Have you ever wondered what lurks in the elusive depths of our universe? Out there, far from our sight, a majestic and unfathomable dance takes place, the brilliance of which will take millions of years to reach us. Colossal, enigmatic and infinitely distant cosmic entities orchestrate a silent symphony that escapes our understanding. Stars, planets, galaxies and clusters of enormous size lurk in our imagination and tempt our curiosity, inviting us to contemplate the unexplored immensity of this vast universe. Who among us has not ever gazed into the celestial vault, dazzled by the light of the stars, and felt the powerful call of the unknown? What traveler has not ever wondered if, beyond the twinkling stars, there are worlds as rich as ours, or perhaps even more complex? From the sparkling hearts of stars, where the elements that gave rise to life are born, to the swirling galaxies containing billions of worlds, each stage of our journey will reveal more and more enigmas to us. The scales of space and time we will face will test the limits of our understanding of the world. As cosmic travelers, we are mere particles before this immensity. Together, we will discover the largest entities and the most immense structures with which we cohabit in this terrifying and fascinating void that is space. 🔥 As a reminder, videos are published on SUNDAYS at 6:00 p.m. ------------------------- 💥 The infinitely large: If the universe seems infinite to us, let us remember that our scale of the world is also infinite for the smallest elements that make up matter. Namely, subatomic particles! Human size is on the order of a meter, which is our reference point for observation. With sharp eyesight, we can see several kilometres away, but also details down to a tenth of a millimetre. But with measuring equipment, we can go much further... Enough to deduce the existence of the primordial components of matter: the famous quarks. If you thought that the atom was the smallest element in the universe, think again. Thanks to numerous investigations, in particular at the CERN particle collider, we now know that every atom is made up of a nucleus and one or more electrons. Most atomic nuclei are made up of neutrons and protons, known as nucleons. Due to the negative electrical charge of electrons and the positive electrical charge of protons, these two elements are held together by the action of the electromagnetic force. This is one of the four great forces that govern the laws of physics as we know it. At the atomic level, the most important forces are the electromagnetic force, but also the strong interaction, which holds atomic nuclei together, and the weak interaction. The role of the latter is rather difficult to describe, although it remains understandable to most people. But you should know that it is as responsible for the radioactive decay of subatomic particles as it is for nuclear fusion at the heart of stars. The last fundamental interaction, and probably the best known of all, is the gravitational force. In other words, gravity. Its intensity depends above all on the mass of the objects in question. It is therefore very present on a cosmic scale, while its role at the level of the atom is insignificant. The atom is made up of neutrons, protons and electrons. But is it possible to go even further? Unsurprisingly, the answer is yes. At the heart of nucleons are other elementary components of matter. These are quarks. And when we try to analyse their size, things get even more complicated... But to understand it better, we have to go back to the structure of the atom. ------------------------- 🎬 Today's program: 00:00 - Introduction 02:40 - From the infinitely small to the infinitely large 21:55 - The largest objects in the cosmos This channel is an official affiliate of the ORBINEA STUDIO network.