A SuperNova is a Super Powerful Stellar Explosion of Awesome magnitude! The Explosion is so Super Awesome, that it is in fact the largest Explosion in Space! Many elements that we see in The Universe are created by SuperNovae; but what creates a Supernova? A Giant death.
The Demise of a The Giant
A Supernova can never come from a Star like our Sun, no it must come from a Giant Star or even a Super Giant Star! A Supernova can come from either a Red Giant, Red Supergiant, Blue Giant or Blue Supergiant. All these Stars are very different, therefore there are more than one type of Supernova. There is a Type 1 Supernova, which comes from a Blue Supergiant and then there is a Type 2 Supernova, which comes from the other giants.
Type 1 Supernova
A Type 1 Supernova is split into three categories, Type 1A Supernova, Type 1B Supernova & Type 1C Supernova. A Type 1A Supernova is a Supernova that has a Strong ionized silicon absorption line. An absorption line is a proclivity of a lower temperature atmospheric gas to intake the equivalent lines of light. Type 1A Supernovae are close to being peak light! Type 1A Supernovae is considered Thermal runaway. Thermal runaway is when a white dwarf star gathers up enough astronomical material from Stellar Companion/ Binary Star to boost its core temperature which will create carbon fusion. This carbon fusion will Start-off runaway nuclear fusion. This believed to be The Creator of a Type 1A Supernova. Type 1B Supernovae are Supernovae that show non-ionized Helium. These Helium lines are neutral. Type 1B is considered Core Collapse. Core Collapse is when Massive Stars, such as Blue Supergiants, Red Supergiants, Blue Giants and Red Giants, core collapses due to the gravity of the nuclear fusion within it. As thou might know, this phenomenon can result in two outcomes usually, Black Holes or a Super Massive Explosion! The only Supernova where Core Collapse does not ensue prior to its inception is a Type 1A Supernova, which explain earlier is from Thermal runaway. Type 1C Supernovae have a weak to no helium and a weak to no silicon absorption feature; Type 1B Supernovae have this second feature as well. Type 1C Supernova also come from Core Collapse of a Massive Star. Type 1C Supernovae can be created by Blue Supergiants.
Type 2 Supernova
Type 1 Supernovae do not show Hydrogen while Type 2 Supernovae show Hydrogen. Type 2 Supernovae are split as well as Type 1 Supernovae into seperate categories that describe the different characteristics of the particular Supernova. The different types of Type 2 Supernovae are Type 2P Supernovae, Type 2L Supernovae, Type 2n Supernovae & Type 2B Supernovae. Type 2P Supernovae are Supernovae that hath a flat stretch known as a plateau that decline in lumosity. This brightness in the Supernovae declines slower that Type 2L Supernovae. Type 2P Supernovae comes from Core Collapse of a Massive Star. Type 2L Supernovae has a steady and slow linear decline in lumosity, not a slow as Type 2P Supernovae, but still slow nonetheless. This decline in light occurs at its peak lumosity. Type 2L Supernovae are created by Core Collapse of a Massive Star just like the previous Supernovae discussed. Both Type 2P Supernovae and Type 2L Supernovae lack narrow lines completely. This is unlike Type 2n Supernovae who in fact have some narrow lines. The 'n' in fact has a purpose in stating that this particular Supernovae (Type 2n Supernova) has a few narrow lines. These lines that are spoke of are lines of hydrogen emissions; hence it being a part of the broader spectrum of Type 2 Supernovae. One way to describe a Type 2n Supernova is an Extremely Energetic Supernova. Type 2n Supernovae also come from a Core Collapse of a Massive Star. Type 2b Supernovae have weak hydrogen lines in its starting spectrum. Eventually though Type 2B Supernovae hydrogen lines become undetectable. Type 2 Supernovae can come from Blue Supergiants, Red Giants, Blue Giants & Red Supergiants.
Afterlife of The Supernova
Supernovae can end in many spectacular ways. Type 1 Supernovae can become a Stellar Nursery. A Stellar Nursery is a plot in Space where dense nebula/nebulae condenses and contracts gas and dust becoming The Creator of Stars in that area. Type 2 Supernova that were previously Blue Supergiants will become Black Holes eventually. Type 2 Supernovae that come from Blue Giants or Red Giants will become Neutron Stars.
Just like Stars, Supernovae come in a broad array of different breeds. Like most of space, the vast spread of different type of astronomical objects come in countless varieties. Supernovae might be considered the most beautiful and Awesome of all of these Space objects. This shows that destroying some old and past its time can create something new and more spectacular than before with elements of the old that make a marvelous spectacle to witness. We too can do the same. If something old is no longer working for thee, change what thou art commencing in life. Keep elements of the old so thou does not lose thy identity completely, but adapt to current situation and become a better more brighter version of thyself, just like a Star becoming, a Supernova!
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