supernova


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  • noun

Words related to supernova

a star that explodes and becomes extremely luminous in the process

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Astronomers affiliated with the Supernova Legacy Survey (SNLS) have discovered two of the brightest and most distant supernovae ever recorded, 10 billion light-years away and a hundred times more luminous than a normal supernova.
But are these explosions worthy of the supernova title if they fail to destroy the star?
Large galaxies usually have no more than three supernovas blow up in a century, but the nearby galaxy NGC 1316 has had two such explosions within the past 5 months and four in the past 26 years.
The astronomers identified 71 supernovas of a certain type known as "1a.
According to the order, "Defendants are enjoined from using the mark SUPERNOVA in conjunction with performing rock and roll music, or recording or selling rock and roll music recordings under the same pending a trial of this action on its merits, or until otherwise ordered by the Court.
Called SN 2017egm, the event took place at a distance of only 420 million light-years from Earth, which is about three times closer than any other superluminous supernova ever observed.
In the case of Tycho's supernova remnant, astronomers have discovered that a reverse shock wave racing inward at Mach 1000 (1000 times the speed of sound) is heating the remnant and causing it to emit X-ray light.
According to them, the odds are nearly 100 percent that such a supernova would be visible to telescopes in the form of infrared radiation.
According to textbooks, a typical core-collapse supernova goes something like this: Massive stars swell into red supergiants, then, with increasing desperation, they fuse successively heavier elements--helium, carbon, oxygen, neon, silicon--in an attempt to stave off gravity's fatal embrace.
That's when studies of exploding stars called type la supernovas revealed that despite the mutual gravitational tug of all the matter in the universe, the cosmos is expanding faster and faster (SN: 1/21/06, p.
Superluminous supernova are about 10 to 100 times brighter than their ordinary counterparts, and scientists are still not sure about the kinds of stars that are involved or of the physical processes that lead to this extreme brightness.
Washington, March 27 ( ANI ): Supernovae were always thought to occur in two main "flavors" - a core-collapse supernova that is the explosion of a star about 10 to 100 times as massive as our Sun and a Type Ia supernova, which is the complete disruption of a tiny white dwarf.
On November 7, 2008, 14-year-old Caroline Moore spotted a supernova in the galaxy UGC 12682 (see page 86).
Although they can't fully explain why a star blows up, astronomers thought that they had accurately determined the maximum mass that a star could have before exploding as a connnon type of supernova.