Las dos TEORÍAS PRINCIPALES del ORIGEN del SISTEMA SOLAR | Ciencias de la Ciencia

#Science #JJPriego #Science Today, along with our astrophysicist Josep María Trigo, we'd like to explain the two main theories of the origin of the solar system. Want to learn more? Let's take a look. Did you like the content? Subscribe, share the video, and give it a thumbs-up. Thank you so much! Get the book "The Cosmic Roots of Life" here: https://www.amazon.es/Ra%C3%ADces-C%C... ALSO FOLLOW US ON: • Twitter:   / josejpriego   • Instagram:   / josejpriego   • Facebook:   / jjpriego   OTHER JJ CHANNELS: • Stories from History:    / @historiasdelahistoriatv   • Easypromos TV:    / @easypromostv   SCRIPT: Two main theories have been proposed to explain the origin of the solar system. The first is known as the hot nebula model. It suggests that the Sun formed from the collapse of a gas nebula. At that moment, as a result of this collapse, gravitational energy was transformed into heat, which caused the gas and dust in the nebula to heat up. As this heat subsided, other phases occurred, such as condensation and sedimentation. Thus, celestial bodies subsequently formed by the aggregation of other smaller bodies depending on the temperature and distance from the Sun. In the early stages, the temperature in this nebula would have been sufficient for silicates to be in the vapor phase at the typical distances where we find the terrestrial planets and the asteroid belt today. Consider that silicates are the most abundant group of minerals on Earth, making up 92% of the Earth's crust. Therefore, in this theory, the mineral components that would later form the protoplanetary disk would progressively condense as the temperature of the nebula cooled after the formation of the Sun within it. In the hot nebula theory, interesting predictions can be made, depending on the partial pressure of the gas in this nebula. Predictions can be made of the temperatures at which the different minerals begin to condense simply by assuming that equilibrium is reached. The second of these is known as the minimum-mass solar nebula model. This suggests that the Sun formed from the rapid collapse of a dense gas core within a cold molecular cloud. The collapse of the Sun's dense progenitor cloud could occur on a timescale of about 100,000 years. After its birth, the star would accumulate a disk-like structure of gas and dust around itself. This disk, called an accretion disk, would feed the central body, attracting it and contributing to its increase in mass. This disk was relatively cold, but subject to the radiant evolution of its central star. In this context, the minimum-mass solar nebula model is defined as the minimum amount of hydrogen and helium that could mix with dust in solar abundances to give rise to the planets we know in our solar system. Estimates for stars like the Sun suggest that the initial mass of material present in the protoplanetary disk would be between 0.05 and 0.01 solar masses (M). During the violent T-Tauri phase experienced by the Sun in its early stages, the materials in the protoplanetary disk would be processed by being irradiated and heated by intense flares, in which coronal gas would be propelled by the intense magnetic fields generated in the photosphere. Furthermore, the intense stellar wind and the magnetic field associated with these early stages of the Sun would allow some of the materials present in the disk not to fall toward the Sun, but to be stored in a toroidal region or ejected great distances, until they reach the regions where planetesimals and cometesimals form. Frank H. Shu and his team proposed that both chondrules and IACs, which, as a reminder, are inclusions rich in calcium and aluminum, could have formed in that region subject to the Sun's violent influence. Today, many authors believe that this could indeed have been the scenario in which IACs formed, but the chondrules could have formed in shock waves produced by the movement of materials within the protoplanetary disk. (...) Knowledge is an essential requirement for survival. Thank you very much. :DDD