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
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.
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.
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.
No, an EO galaxy is not a type of elliptical galaxy. They are a lenticular galaxy.
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, a tadpole galaxy is not a type of peculiar galaxy. It is a barred spiral galaxy.
Yes, a double galaxy is a type of peculiar galaxy.