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physical object > natural object > celestial body > star > emission line star > supernova
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supernova comparison table
Subject has frequency is an instance of has location has spectra has absolute magnitude is a kind of has mass has ejecta velocity has definition
S Andromedae supernovaor center of gravity   greater than 0.08 the sun's mass A supernova seen in 1885 in the Andromeda galaxy.
type I supernovaless common than type II supernova spiral and elliptical galaxiesnonhydrogen linesMv = -14 to -17supernovalower than type II supernova10000 km s-1A supernova which may be produced by the thermonuclear detonation of a highly degenerate core produced by mass transfer from a companion star.
type II supernova0.01 to 0.05 per year (in our Galaxy) young, massive stars near the edge of spiral armshydrogen linesMv = - 12 to - 13.5supernovahigher than type II supernova5000 km s-1A gigantic stellar explosion in which the star's luminosity suddenly increases by as much as a billion times. Most of the star's substance is blown off, leaving behind, at least in some cases, an extremely dense core which may be a neutron star.
type III supernova  or center of gravity  supernovamuch higher than type II supernova Supernova similar to Type II

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