The Australian digital medium ScienceAlert, specialized in science and technology, shared an interesting article where he states that new research would indicate the imminent end of our solar system. In this sense, heScientists have made predictions about what the last days of our Solar System will look like and when it will happen.
Until relatively recently, specialists thought that the Sun would become a planetary nebula, a luminous bubble of gas and cosmic dust. However, an international team of astronomers investigated it again and discovered that the sun will transform into a planetary nebula.
the final hour
The Sun is about 4.6 billion years old. calculated on the age of other Solar System objects that formed at about the same time. Based on the outcome of other stars, astronomers predict that it will reach the end of its useful life in another 10 billion years.
As it was verified, in about 5,000 million years, the Sun will become a red giant. This means that the core of the star will shrink, but its outer layers will expand to the orbit of Mars, destroying our planet in the process.
Although this scenario seems devastating, many scientists agree that the human race will no longer exist by that time. In fact, humanity only has about a billion years left unless we find a way to live outside of our world.
As the experts at Science Alert explain, the Sun’s brightness increases by about 10 percent every billion years. Although it may not seem like much, this will be the cause of the end of life on Earth. Our oceans will evaporate and the surface will get too hot for water to form.
It is what comes after the red giant that has proven difficult to pin down. Several previous studies have found that for a bright planetary nebula to form, the initial star must have been up to twice as massive as the Sun.
However, the 2018 study used computer modeling to determine that, like 90 percent of other stars, our Sun is more likely to shrink from a red giant to a white dwarf and then end up as a planetary nebula. says ScienceAlert.
“When a star dies, it expels a mass of gas and dust, known as its envelope, into space.. The envelope can have up to half the mass of the star. This reveals the core of the star, which at this point in the star’s life is functioning. Without fuel, it eventually burns out and eventually diesexplained the astrophysicist Albert Zijlstra from the University of Manchester in the UK, one of the paper’s authors.
“It is only then that the hot core causes the ejected envelope to shine brightly for about 10,000 years, a short period in astronomy. This is what makes the planetary nebula visible. Some are so bright that they can be seen from extremely great distances measuring tens of millions of light-years, where the star itself would have been too faint to see.“.
Planetary nebulae are relatively common throughout the observable Universe, with some famous ones including the Helix Nebula, Cat’s Eye Nebula, Ring Nebula, and Bubble Nebulareports Science Alert.
They are called planetary nebulae not because they actually have anything to do with the planets, but because, when William HerscheHe discovered the first ones at the end of the 18th century, they had a similar appearance to the planets through the telescopes of the time.
Nearly 30 years ago, astronomers noticed something peculiar: the brightest planetary nebulae in other galaxies are about the same level of brightness. This means that, in theory at least, by looking at planetary nebulae in other galaxies, astronomers can calculate how far away they are.
The data showed this to be correct, but the models contradicted it, which has been puzzling scientists ever since the discovery was made, Science Alert reports.
New models have solved this problem by showing that the Sun has roughly the lower mass limit for a star that can produce a visible nebula.
Even a star with a mass less than 1.1 times that of the Sun will not produce a visible nebula. Larger stars, up to 3 times more massive than the Sun, on the other hand, will produce brighter nebulae.
For all other intermediate stars, the predicted brightness is very close to what has been observed, says Science Alert.
“this is a good resultZijlstra said.Not only do we now have a way to measure the presence of stars of ages of a few billion years in distant galaxies, which is a range that is notoriously difficult to measure, even we have discovered what the sun will do when it dies!”.
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