Type Ib and Ic supernovae
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Type Ib and Type Ic supernovae are categories of supernovae that are caused by the stellar core collapse of massive stars. These stars have shed or been stripped of their outer envelope of hydrogen, a
The Type Ib supernova SN 2008D in galaxy NGC 2770, shown in X-ray (left) and visible light (right), at the corresponding positions of the images. (NASA image.)
G299 Remnants Super Nova Type 1a 20150218
Type II supernova
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A Type II supernova or SNII results from the violent explosion of a massive star following the rapid collapse of its core. A star's mass must be at least 8 times, but no more than 40 to 50 times, the
Type Ib and Ic supernovae
…supernova classification scheme based upon the absorption lines that appear in its spectrum. A supernova is first categorized as either a Type I or Type II, then subcategorized based on more specific traits. Supernovae belonging to the general category Type I lack hydrogen lines in their spectra; in contrast…
The expanding remnant of SN 1987A, a peculiar Type II supernova in the Large Magellanic Cloud. NASA image.