The True Scale of the Largest Star Ever Discovered in the Universe скачать в хорошем качестве

The True Scale of the Largest Star Ever Discovered in the Universe

What if a single star was so massive it could swallow Saturn, Jupiter, Mars, Earth, and everything in between? Tonight, we explore the mind-bending true scale of the largest star ever discovered - Stephenson 2-18 - a dying red supergiant so enormous that light itself needs over 8 hours just to travel around it once. But this isn't just a list of big stars. We go deep into the physics of WHY some stars grow to such impossible sizes. From the moment a massive star exhausts the hydrogen in its core, a dramatic transformation begins - one that inflates the star from a compact blue giant into a bloated red supergiant thousands of times wider than our Sun. The largest stars in the universe aren't just big. They're dying. Every one of them is a red supergiant in the final stages of its life, its core racing through heavier and heavier elements while its outer envelope swells to fill a volume larger than Saturn's orbit. And when they finally collapse, they explode with more energy than the Sun will produce in its entire 10-billion-year lifetime - seeding the cosmos with the very elements that make planets and life possible. Sources: Levesque, E. M. (2017). Astrophysics of Red Supergiants. IOP Publishing. https://iopscience.iop.org/book/mono/... Arroyo-Torres, B., Wittkowski, M., Marcaide, J. M., & Hauschildt, P. H. (2013). "The atmospheric structure and fundamental parameters of the red supergiants AH Scorpii, UY Scuti, and KW Sagittarii." Astronomy & Astrophysics, 554, A76. https://www.aanda.org/articles/aa/abs... Humphreys, R. M., Helton, L. A., & Jones, T. J. (2007). "The Three-Dimensional Morphology of VY Canis Majoris. I. The Kinematics of the Ejecta." The Astronomical Journal, 133(6), 2716–2729. https://iopscience.iop.org/article/10... Smartt, S. J. (2009). "Progenitors of Core-Collapse Supernovae." Annual Review of Astronomy and Astrophysics, 47, 63–106. https://www.annualreviews.org/doi/10.... Davies, B., & Beasor, E. R. (2020). "The 'red supergiant problem': the upper luminosity boundary of Type II-P supernova progenitors." Monthly Notices of the Royal Astronomical Society, 493(1), 468–476. https://academic.oup.com/mnras/articl... #LargestStar #Stephenson218 #RedSupergiant #StellarEvolution #SpaceExploration #Supernova #Astronomy