The supernova that had gone off last week has now been named 2012 aw, located near by the path of the orbit of Mars (however not on the orbit of Mars). The type of the supernova is that of a supergiant star collapsing and exploding outward. This indicates the stars mass was between 8Mo<Ms<20Mo before it burst into a supernova.
After the shine disappears from the blast and dust clears, what will remain of the star will be a neutron star having a mass Ms<3Mo and about ~10 km in radius. Some may ask, "why not a blackhole?" Well, in order for a blackhole to be the final remnant of a star, its mass has to be 8Mo<Ms. When the star burst, instead of just blowing out its out layers, it completely obliterates itself releasing a large gamma-ray burst or hypernova. The pressure at the core becomes extremely unstable and begins to collapse of itself. This is the creation of a blackhole which will being to swallow light it traps and matter it encounters.
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