Prof Zijslra explains: "When a star dies it ejects a mass of gas and dust - known as its envelope - into space".
Due to the hot core, the ejected ring shines brightly for nearly ten thousand years, making the planetary nebula visible. "Even if the Sun becomes rather dim nebula, it will still be visible from neighboring galaxies", said Professor of astrophysics the University of Manchester albert Zijlstra.
The moment when it is about to wither away, it will turn into red giants and finally conclude into white dwarfs before extinguishing from the planetary system.
The new study suggests that the sun is actually one of the lowest-mass stars that could produce a planetary nebula. Stars even just a few percent smaller than our sun do not produce any planetary nebula at all - even our own star will only produce a faint one. Further, he said that this unveils the core of the star, which at this scenario in the life of the star is gradually getting exhausted before dying off finally.
"It is at this point that the hot core makes the ejected envelope shine for about 10,000 years and that is what makes the planetary nebula visible", said Zijlstra.
"These planetary nebulae are the most handsome objects in the sky".
According to Science Daily, a team of researchers designed a new model predicting the lifespan of stars.
It's inevitable; in about 5 billion years our sun will burn up all of the hydrogen in its core, then it will swell into a red giant, eating Mercury and Venus before collapsing.
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Christophe Morisset, an astronomer at the National Autonomous University of Mexico, tells the publication that the new model operates on the theory that when lower-mass stars expel their envelopes, the cores heat up more rapidly than scientists previously thought.
The data showed that this was correct, but the models contradicted it, which has been vexing scientists ever since the discovery was made. According to this model, the sun does indeed have the required mass to create a planetary nebula.
New models show that once the ejection of the envelope is complete, the heat of the stars increases up to three times faster as compared to the previous models.
The new research suggests that the sun will transform into a planetary nebula - a massive glowing globe of gas and dust.
A new stellar death model reveals how our sun is going to die and solves a 25-year-old science problem in the process. However, they couldn't find out what would happen after the Sun ceased to be a star. "Problem solved, after 25 years!"
"This is a nice result".
"We found that stars with mass less than 1.1 times the mass of the sun produce fainter nebula, and stars more massive than 3 solar masses brighter nebulae, but for the rest, the predicted brightness is very close to what had been observed", Zijlstra said.