What are really bright objects in universe?

Today in my 3rd post I would like to tell you something about two kinds of objects (from universe) which are very bright.

First one is quasar and blazar. As far as i know they are probably same thing but from different angle of view. They are very bright and in middle of them are black holes (if you want to read something about BH then read my second post).

When stars or lot of stuff (dust) around hole starts to accelerate toward the black hole, lot of heat and radiation will be created because particles in high speed will rub againt each other. This will create massive disk around hole. That is called quasar/blazar and it can be even brighter then our own Galaxy!

Second object is Supernova.
It is created in two ways. I will try to explain only the first one because again, i dont really understand how the second works.
Anyway, imagine you have white dwarf (like our sun when it will be few billions years older). It is object which has such mass like our sun but it is big like Earth. It is shining even that termonuclear reaction does not occur anymore. After some time it will turn to black (cold) dwarf. But if this dwarf gains some mass again and heat inside core will be high enough to create another round of reaction it will violently explode! Picture on the left shows galaxy and that “little” point is actually supernova. It does not shine long time, only for weeks or months.

So those are the two bright objects in our universe. I hope i did not miss something important.
Btw. thanks to people who liked my posts, i really appreciate that.
Dragallur
PS. next time I will probably move to something on the earth!

P.1: Quasar. (2015, March 2). In Wikipedia, The Free Encyclopedia. Retrieved 12:47, March 20, 2015, from http://en.wikipedia.org/w/index.php?title=Quasar&oldid=649527988

P.2: Supernova. (2015, March 17). In Wikipedia, The Free Encyclopedia. Retrieved 12:47, March 20, 2015, from http://en.wikipedia.org/w/index.php?title=Supernova&oldid=651800657

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