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A supernova ( pl.: supernovae or supernovas) is a powerful and luminous explosion of a star. A supernova occurs during the last evolutionary stages of a massive star, or when a white dwarf is triggered into runaway nuclear fusion. The original object, called the progenitor, either collapses to a neutron star or black hole, or is completely ...
4 days ago · A supernova of a star more than about 10 times the size of our sun may leave behind the densest objects in the universe—black holes. The Crab Nebula is the leftover, or remnant, of a massive star in our Milky Way that died 6,500 light-years away. Astronomers and careful observers saw the supernova in the year 1054.
3 days ago · Supernova, any of a class of violently exploding stars whose luminosity after eruption suddenly increases many millions of times its normal level. When a star ‘goes supernova,’ considerable amounts of matter may be blasted into space with such a burst of energy as to enable the star to outshine its entire home galaxy.
Apr 14, 2023 · This one begins as a bright dot just above the arc of the galaxy. Almost a year later, Earth time, the supernova is no longer easily visible. Shock waves, gas and radiation spread out across the ...
Nov 12, 2020 · A supernova, on the other hand, is a much bigger and intrinsically much brighter event (hence the prefix super) where the outer layers of a star are blown explosively into space. A star that goes ...
Jun 19, 2023 · A supernova is the explosion of a massive star. There are many different types of supernovae, but they can be broadly separated into two main types: thermonuclear runaway or core-collapse. This ...
