No. A supernova is a massive explosion, usually from a dying supermassive star.
M81 is a spiral galaxy. I have seen it through several telescopes and it is a beauty! There was a Type II supernova in 1993 and I was able to find it in my 6" 'scope.
Galaxy
The only one I know of is G350.1-0.3, It was thought to be a galaxy but turned out to be a supernova remnant.
Betelgeuse is expected to end its life in a supernova explosion, likely as a Type II supernova due to its massive size and age. This type of supernova occurs when a massive star exhausts its nuclear fuel and collapses under its own gravity.
Because they are massive explosions that can outshine a whole galaxy.
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Massive stars that are at least eight times more massive than the Sun end their life as a supernova. During the explosion, these stars release a tremendous amount of energy and can briefly outshine an entire galaxy.
Not sure what you mean. For a few days, a supernova shines as bright as an entire galaxy - that is, roughly as bright as 100 billion stars.
Large Spiral Galaxy. This is because they contain more of the OB stars that are required for a supernova event. Elliptical galaxies tend to be older and have more low mass stars and are not as common as spiral galaxies. See Link for more information
No, an EO galaxy is not a type of elliptical galaxy. They are a lenticular galaxy.
No, a tadpole galaxy is not a type of peculiar galaxy. It is a barred spiral galaxy.
Yes. A ring galaxy is a type of peculiar galaxy.