Changes

===Type 1b and Ic===

===Type 1b and Ic===

Type lb and Ic supernovae, like Type II supernovae, are from massive stars that are running out of core fuel for fusion.  However the stars for type Ib explosions had their outer shell of hydrogen lost or striped away, and type Ic are from stars that have lost most of both its [[hydrogen]] and subsequent [[helium]] shell. This loss is either due to intense stellar winds, or from interaction with a nearby binary companion of sufficient mass.<ref>http://adsabs.harvard.edu/abs/1997rdbs.conf..153P</ref>  It is believed that type 1b supernovae are from exploding [[Wolf-Rayet]] stars.  There is some evidence that a small percentage of type Ic supernovae are the source of [[Gamma-Ray Bursts|Gamma Ray Bursts]].<ref>http://adsabs.harvard.edu/abs/2004MNRAS.349.1093R</ref>

Type lb and Ic supernovae, like Type II supernovae, are from massive stars that are running out of core fuel for fusion.  The stars for type Ib explosions had their outer shell of [[hydrogen]] lost or striped away. The stars for type Ic explosions have lost most of both their hydrogen and subsequent [[helium]] shell. This loss is either due to intense stellar winds, or from interaction with a nearby binary companion of sufficient mass.<ref>http://adsabs.harvard.edu/abs/1997rdbs.conf..153P</ref>  It is believed that type 1b supernovae are from exploding [[Wolf-Rayet]] stars.  There is some evidence that a small percentage of type Ic supernovae are the source of [[Gamma-Ray Bursts|Gamma Ray Bursts]].<ref>http://adsabs.harvard.edu/abs/2004MNRAS.349.1093R</ref>

==Type II==

==Type II==