There are those who call it the end of the world, there are those who dare the term “apocalypse”. Whatever words are used the death of the sun this is one of those events that has always fascinated and at the same time frightened mankind: when this happens, it will be the end of everything for us, the inhabitants of the Earth. Like all stars, the Sun also passes through its life cycle and it is inevitable that this cycle will end sooner or later. Astronomers have always speculated widely about when this will happen, but today we can say with certainty that we have a date. And thanks Gaia’s calculationsspacecraft on a mission for ESA.
When the sun dies on Gaia
L’European Space Agency launched Gaia on a mission in 2013, and since then the spacecraft serving as a space observatory has collected vast amounts of data on the billions of stars in our galaxy and in our immediate vicinity. Since then, Gaia has studied them in detail, analyzing their temperature, size, mass, brightness, and appreciating every slightest deviation of these factors.
Of course, the ESA mission could not bypass the Sun, our star. And, using the Hertzsprung-Russell diagram, he was able to predict quite accurately (at least compared to what has been done so far) the moment the sun goes down and therefore he will die.
No alarmism, as far as we know, the prediction of Gaia does not speak of immediate catastrophes. The spacecraft, which is currently 930,000 miles from Earth, has calculated that the Sun it is currently about 4.57 billion years old. and which is still stable. According to data collected by Gaia, our star will reach its maximum temperature in about 8 billion years, at which point the process of recooling will begin. Reached 10 or 11 billion years The Sun will effectively become a red giant as it grows in size and approaches its final sunset.
The good news is that before all this happens and the Sun turns into a cool white dwarf, eventually leaving behind a nebula of gas and dust, it would still take 5 to 6 billion years.
What will happen to the Earth after the death of the Sun
Considering that we will never see the death of the Sun and that this will happen in billions of years, we cannot deny that there is a lot of curiosity about what will happen to the earthas soon as our star goes out forever. It’s no secret that solar activity has an impact on Earth’s, and we saw this just a month ago with a coronal mass ejection that engulfed the previous one, causing a strong geomagnetic storms. And we know how they can interfere with satellites or our power systems.
When the sun goes out, the consequences will be much more devastating than a simple solar storm. It will no longer contain hydrogen, which can no longer fuse into helium, becomes unstable. At this point, it will no longer produce energy and will begin to collapse under its own weight, and the remaining helium core will continue to heat up due topressure increase. And as soon as it becomes a red giant, the decline of the Earth will begin with the evaporation of the oceans, decaying into hydrogen and oxygen atoms. At this point, the atmosphere will become denser and denser. life on earth is no longer possible.
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