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Scientists have found new evidence of how the sun died

BingMag.com Scientists have found new evidence of how the sun died

Scientists have come up with accurate modeling that shows how the end of the central star of the solar system will be determined and what fate awaits the sun after death.

The death of the sun is one of the topics that has always been part of astronomers' research work, and scientists have predictions about how the solar system will end. However, humans are not close to such an event that they can see it up close.

In the past, astronomers thought that the sun would become a planetary nebula when it died. A glowing bubble of gas and dust made up of star debris. But evidence shows that the star must be much more massive to form a planetary nebula. However, in 2018, an international team of astronomers re-examined the issue and found that the planetary nebula is in fact the most likely shape for the end of the sun. It is 4.6 billion years old. This number is based on the age of other solar system objects formed at the same time. On the other hand, according to other star observations, astronomers predict that the star of our system will end its life in about 10 billion years.

Of course, other events will take place in the path of the death of the central star of the solar system. The sun will become a red giant in about 5 billion years. The star's core shrinks, but its outer layers extend to the orbit of Mars, devouring the Earth if it is still in place.

What is certain is that we will not exist at that time. In fact, humanity can only live on Earth for another 1 billion years, unless, as Ilan Musk envisions, a way is found to leave the planet; Because the brightness of the sun increases by about 10 percent every 1 billion years.

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Although it may not seem like much, it is so severe that it will end life on Earth. The oceans evaporate and the earth's surface becomes very hot to form liquid water. Human beings will be completely destroyed in this situation.

This is what happens with the formation of a red giant that is confirmed and difficult to change. Various studies in the past have shown that in order to form a glowing planetary nebula, the primary star must be twice as massive as the Sun.

The formation of the Planetary Nebula

In the journal Nature Astronomy, computer modeling was used and it was found that, like 90% of other stars, our sun is likely to eventually turn from a red giant to a white dwarf. The formation of a planetary nebula is part of its death process. "When a star dies, it throws a mass of gas and dust known as an envelope into space," said Albert Zijlstra, an astrophysicist at the University of Manchester. The envelope can have a mass of half a star. This reveals the star's core, which is running out of fuel at this point in the star's life. "

" Have a high shine. This is what makes the Planetary Nebula visible. Some of them are so bright that they can be seen from great distances of tens of light years. "Where the star's own light is much weaker to observe." Specify the brightness of the planetary nebula related to the various masses of the star.

BingMag.com Scientists have found new evidence of how the sun died

Cat-eye Nebula Nebula
Credit: NASA/ESA

Asteroid nebulae are commonly seen around the world, including the Spiral Nebula, the Cat-Eye Nebula, and the Ring Nebula. The bubble pointed. These objects have nothing to do with planets, but are so named because they were first made from planet-like telescopes when first discovered by William Herschel in the late 18th century.

  • NASA Stunning Images of Galaxies, Stars, and Supernova Remains They have the same brightness. So, at least in theory, astronomers can calculate the distances of planetary nebulae by observing planetary nebulae. Discovery has so far occupied the minds of scientists. "Old, low-mass stars must form much weaker planetary nebulae than younger, more massive stars, and this discrepancy between observations and modeling has been a challenge for the past 25 years," according to data. They can be composed of low-mass stars like the Sun, but modeling does not allow this, and anything less than twice the mass of the Sun makes the planetary nebula too weak to see.

    Finally, the 2018 research models The fact that the Sun is near the lower limit of mass for stars that turn into planetary nebulae solves this problem. Larger stars, on the other hand, will produce brighter nebulae up to three times the mass of the Sun. For all the other stars in this range, the predicted brightness was very close to what was observed. Not only do we now have a way to measure the presence of multibillion-year-old stars in distant galaxies, a range that is very difficult to measure, but we have even figured out what the sun will look like when it dies.

    Cover Photo: Graphic Design From the Death of the Sun

    Credit: Science Insider


Source: Science Aelert

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