🌍 Have you ever looked up at the starry sky on a summer night? When we look into the cosmos, we are assailed by existential questions. Are we alone among the stars? How far does our universe reach? What mysteries does it hold? What lies beyond what we can observe? These questions, as terrifying as they are fascinating, are beyond our ability to understand. But scientific discoveries and technological advances in recent decades have opened our eyes. Our vision and understanding of the universe are limited, and the universe is full of surprises. Black holes, exoplanets, vampire stars, supernovas, comets, nebulas, dark matter... Yes, space is full of curiosities, each one more surprising than the last! 🔥 As a reminder, videos are published on SUNDAYS at 6:00 p.m. ------------------------- 💥 Journey to our Universe: If our universe is about 14 billion years old, you should know that our Milky Way was born almost at the same time as it. In fact, scientific research has made it possible to estimate its age by observing the oldest bodies in it. This is the case of the star HE 1523-0901, one of the oldest in our galaxy. With an age of 13.2 billion years, this red giant is located 7,500 light years from Earth. This news surprised scientists, including astronomer Anna Frebel and her team, who discovered it in 2007. However, just six years later, the star HD 140283 took center stage. It is not clear how old it is. Measurements made with the Hubble satellite led to the conclusion that it could well be 14.5 billion years old, i.e. older than the observable universe... However, taking into account the uncertainty of the results and new measurements, this estimate is now between 13.2 and 13.7 billion years old. Proxima Centauri, also known as Proxima Centauri, is the closest star to our Sun ever discovered. However, with the technology we currently have, it is impossible for us to reach it. Imagine that you are driving a space shuttle going 100 km/h. To reach Proxima, you would need 60 million years... However, if you had the possibility of travelling at the speed of light, the travel time would be more acceptable. Just over 4 years. Located almost 40,000 trillion kilometres from the Sun, it is a small and faint star compared to ours. Proxima is about 8 times less massive and 20,000 times dimmer than the Sun. In terms of its size, it is estimated to be 7 times smaller. It belongs to the category of red dwarfs. Red dwarfs are the most common stars in our galaxy. They make up about 80% of the stars in our galaxy, a total of 240 billion of the 300 billion stars in our Milky Way. These planets are called Proxima B, C and D respectively. Unfortunately, these New Worlds do not seem to be ideal candidates for the emergence of life as we know it. Due to its strong and unstable magnetic field, solar flares are frequent on Proxima Centauri. So even though Proxima B is in the habitable zone of its star, the chances of it hosting life are still slim... These double stars are called Alpha Centauri A and B, and together with Proxima (Alpha Centauri C), they form an unusual star system. ------------------------- 🎬 In today's show: 00:00 - Introduction 04:03 - The oldest star in our galaxy 02:42 - The oldest star in the universe 07:53 - Our closest neighbor: Proxima Centauri 10:33 - A star is born! 16:26 - Ambrosia's new administrator will take over Cavendish 16:26 - Ambrosia's new administrator takes over Cavendish 18:26 - New study on the impact of climate change on children's health 16:26 - Ambriz's new administrator takes over 12:26 - Ambriz's new administrator takes over 16:25 - Supernovas: Incredible cosmic explosions! 16:26 - Ambrosia's new administrator will take over Cavendish's activities 16:26 - Ambrosia's new administrator will take over Cavendish 16:30 - The mass of New York in a teaspoon! 45:38 - Pulsars and gamma-ray bursts 16:23 - New study on the impact of tsunami on the environment 54:22 - Incredible types of galaxies 59:50 - Dark matter 01:07:15 - The largest galaxy 01:08:35 - The most distant galaxy