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Home https://server7.kproxy.com/servlet/redirect.srv/sruj/smyrwpoii/p2/ Science https://server7.kproxy.com/servlet/redirect.srv/sruj/smyrwpoii/p2/ The scientist's view of a dying star shows how the Earth will be destroyed

The scientist's view of a dying star shows how the Earth will be destroyed



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The sun will ultimately invade a red giant and fry everything we know.


NASA
One day, the sun will burn everything on Earth to crisp. This is an alarming but inevitable reality that will not happen until all we know is gone, but recently astronomers had the rare opportunity to see this dark future. An international team of scientists has seen a rare convulsion of the star Ursae Minoris (T UMi), which is similar to our sun but older in the red giant phase near the end of its life.

"This is one of the rare possibilities when the signs of aging can be observed directly in a star over the human scale," said Marid Joyce, an Australian National University (ANU) astronomer.

The study that Joyce led with astronomers from Hungary was published in the Astrophysical Journal.


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Joyce explains that T UMi and our sun are expected to end up in some kind of swollen, not explosive supernova. Billion years from now on, the sun will grow into a red giant like T UMi now. Then it will expand into a blazing layer of gas, leaving behind a small vague star as its star corpse. "It will get much bigger when it comes to death – Venus, Mercury, and probably the Earth in the process – before shrinking to become a white dwarf," she said. T UMi is 3000 light years away and has been through a series of impulses over the last few million years as part of its transition from a red giant to a white dwarf. "These impulses cause drastic, rapid changes in the size and brightness of the star seen over the centuries," explains Joyce, adding that over the last three decades the star has become smaller, weaker, and cooler. "We believe the star is entering one of its last remaining impulses and we expect to see it expand again in our lives."

It's not as dramatic as a supernova explosion, but it's still interesting to see an end that will eventually hit our home. Unless, of course, we can not climb the cloud and send the servers to Alpha Centaur or somewhere else in the galaxy.


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