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- Elizabeth Landau
An astronomer named Carl Sagan famously said. "We're made of star stuff, Nuclear reactions that happened in ancient stars generated much of the material that makes up our bodies, our planet and our solar system." When stars explode in violent deaths called supernovae, those newly formed elements escape and spread out in the universe. To explain it, scientists must reconsider established ideas about how massive stars live out their lives before exploding.
Astronomers classify exploding stars based on whether or not hydrogen is present in the event. While stars begin their lives with hydrogen fusing into helium, large stars nearing a supernova death have run out of hydrogen as fuel. But SN 2014C, discovered in 2014 in a spiral galaxy about 36 million to 46 million light-years away, is different. astronomers concluded that SN 2014C had transformed itself from a Supernovae in which very little hydrogen (Type I) to an abundance of hydrogen, which are rarer (Type) II supernova after its core collapsed.
NASA's Chandra and Swift observatories were also used to further paint the picture of the evolution of the supernova. The collection of observations showed that, surprisingly, the supernova brightened in X-rays after the initial explosion, demonstrating that there must be a shell of material, previously ejected by the star, that the shock waves had hit.
The study suggests that astronomers should pay attention to the lives of massive stars in the centuries before they explode because another possibility is that the star did not die alone. Astronomers will continue monitoring the aftermath of this perplexing supernovae.
by Dini Dwintika Karuniati
16611042
Article Science
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