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Post by Lone Wanderer on May 8, 2018 5:57:44 GMT
Source: What will happen when our sun dies?Scientists agree the sun will die in approximately 10 billion years, but they weren't sure what would happen next...until now. Astronomers predict it will turn into a massive ring of luminous, interstellar gas and dust, known as a planetary nebula. A team of international astronomers, including Professor Albert Zijlstra from the University of Manchester, predict it will turn into a massive ring of luminous, interstellar gas and dust, known as a planetary nebula. A planetary nebula marks the end of 90% of all stars active lives and traces the star's transition from a red giant to a degenerate white dwarf. But, for years, scientists weren't sure if the sun in our galaxy would follow the same fate: it was thought to have too low mass to create a visible planetary nebula. Prof Zijslra explains: "When a star dies it ejects a mass of gas and dust -- known as its envelope -- into space. The envelope can be as much as half the star's mass. This reveals the star's core, which by this point in the star's life is running out of fuel, eventually turning off and before finally dying. "It is only then the hot core makes the ejected envelope shine brightly for around 10,000 years -- a brief period in astronomy. This is what makes the planetary nebula visible. Some are so bright that they can be seen from extremely large distances measuring tens of millions of light years, where the star itself would have been much too faint to see."
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Post by Elizabeth on May 8, 2018 6:36:46 GMT
So....people die. XD
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Clovis Merovingian
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Post by Clovis Merovingian on May 8, 2018 7:03:14 GMT
The sun according to scientists is supposed to expand and one day envelop and burn up the earth if i'm not mistaken.
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Post by Διαμονδ on May 8, 2018 7:55:35 GMT
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Deleted
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Post by Deleted on May 8, 2018 12:51:34 GMT
There will be 8 minutes of light, then darkness, and finally total Arktos.
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Post by Deleted on Jun 30, 2018 2:21:29 GMT
Often in the centre of a planetary nebula the white dwarves are present. Sun is currently a yellow dwarf, similarly to Helvetios from Pegasus constellation. Generally, the yellow dwarves exist for ~10 billions of years, but Sun already exists for some time (4,57 billions).
In about 5,5 billions of years it will no longer be a star of the main sequence (a dwarf) and will start a process in becoming a red giant, just like now are Aldebaran from Taurus constellation and Pollux from Gemini constellation. Before it will become a giant, Sun will be already big enough to consume the Earth's orbit (as a subgiant). In such state of a red giant it will exist for some millions of years, and eventually the mentioned scenario will take place. More massive red giants turn into red supergiants and eventually turn into a supernova.
The planetary nebula will disappear in few thousands of years, but the white dwarf will exist for other billions of years.
For the mankind it's the best idea to be far away from Earth already.
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MEGA
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Post by MEGA on Jun 30, 2018 2:40:47 GMT
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