send to Telegram
share on Facebook
send to Viber
send to Whatsapp
send to Messenger
Our Sun will die one day, but scientists have figured out when that will happen. As it turned out, there will be no people on Earth until that moment.
French astronomers, using new data from the Gaia space telescope, were able to compile a chronology of the life of our Sun until the death of a star. The most interesting thing is that long before the end of the life cycle of the Sun, humanity will no longer be on Earth and there is a good reason for this, according to ScienceAlert.
Scientists led by Orlach Krivi from the Côte d'Azur Observatory, France, analyzed data from a space telescope Gaia, who maps the Milky Way and studies the stars of our galaxy.
The purpose of the study was to determine exactly when our Sun will die. In order to find out, scientists were looking for stars similar to the Sun, with which it would be possible to trace the life cycle of our star. Thanks to this, scientists have received a detailed chronology of the life of the Sun.
The Sun is a yellow dwarf star, which is approximately 4.57 billion years old. This type includes stars with masses from 0.87 to 1.15 solar masses and temperatures from 4.7 to 5.7 thousand degrees Celsius. The surface temperature of our star is 5.5 thousand degrees Celsius.
During their search, scientists identified 5863 stars that have different ages and are very similar to the Sun. They then identified a much smaller group of stars that best matched the parameters of our star.
According to scientists, based on observations of the life of other stars, the future history of the Sun should look like this:
- For several billion years, the Sun will constantly heat up. Moreover, the temperature and brightness of the star will increase by about 10% every billion years. The peak of the highest temperature and brightness of the Sun will reach when the star is about 8 billion years old.
- When the Sun begins to run out of hydrogen, and this is the main element of which the Sun consists, the core of the star will begin to shrink. In this case, the outer atmosphere of the Sun will greatly expand, perhaps even to the orbit of Mars. When the Sun is about 10-11 billion years old, our star will turn into a red giant.
- After that, the Sun will run out of hydrogen and helium, all the matter around the core will be ejected into space and a planetary nebula will form from it. And the core itself will shrink so much that the Sun at the end of its life will turn into a white dwarf. This white dwarf will take another few billion years to cool down completely.
But the most interesting thing is that humanity on Earth will be able to live no more than 1 billion years, scientists say. This is due to the fact that the brightness of the star will increase by 10%, as mentioned above, and, accordingly, the conditions on the planet will become unsuitable for life. If humanity does not destroy itself within this billion years, then scientists hope that technology will allow people to move to other planets in our galaxy by this time.
As Focus already wrote, every year our planet is moving away from the Sun, which means that climate change is coming.