According to research, the Sun is approximately 4.6 billion years old. This could be calculated from the age of the other objects in the Solar system, which were formed at the same time. Until now the scientific community thought that once the Sun died it would be a kind of planetary nebula. that is to say, a luminous bubble of gas and dust.
However, now according to Science Alert, the most likely thing to happen with the Sun is that indeed it will be a planetary nebula but “more massive” than was estimated in the first investigations carried out.
Furthermore, astronomers stipulated that the sun has about 10 billion more years to live. They came to this conclusion based on observations of the life of other stars. But humanity has less time to figure out how to live outside of Earth.
In that sense, the experts explained that humanity will be extinct in about a billion years, and it is expected that it will no longer be on Earth when it is indeed the death of the Sun, since the star brightens 10% every billion yearsBy that time, the oceans will have evaporated and the surface will warm, preventing water from re-forming to make it habitable.
Until the Sun finally dies, it will first have to become a red giant star, which is expected to happen in 5 billion years, and then it will probably transform into a White dwarf.
What is a planetary nebula?
“When a star dies, it expels a mass of gas and dust, known as its envelope, into space. The envelope can be up to half the mass of the star. This reveals the core of the star, which at this point in the star life is running out of fuel, eventually shutting down and before finally dying “explained the astrophysicist Albert Zijlstra from the University of Manchester in the United Kingdom, one of the authors of the article.
According to the AstroAfición portal, when the sun dies, it will become a planetary nebula, a large cloud of dust and gas, the latter composed mainly of hydrogen and helium. There are different types of nebulae, such as those that form when a star is born or those that are generated when one of these dies.
In fact, a few days ago the hubble telescope published in his account of the social network Twitter what the appearance of the Planetary Nebula Hen 2-437: this has symmetrical wings that are the gaseous outer layers characteristic of a dying star.
Finally, they receive this name because their appearance is very similar to that of a planet. They are common in the observable Universe, and some cases are already known: the Helix Nebula, Cat’s Eye Nebula, Ring Nebula, and Bubble Nebula.