Then the sun would burn earth,animals, plants,humans would die because it's too hot for earth venus and Mercury.
The sun is neither a supernova nor a white dwarf. The sun is a main sequence star. A supernova is not a kind of star: it is the explosion of a massive star.
The obvious reason is that the specific star has bigger density compared with the Sun. For example, that star could be a "white dwarf star". A white dwarf mostly contains "electron degenerate matter", which is very dense. A white dwarf is a small dense star.
The sun I think
it goes boom
Our Sun could never become a nova as a nova requires a companion star, and as we only have the one star (The Sun) it is impossible.
After the sun runs out of fuel is will become a white dwarf, a neutron star, or a black hole.
Convert into a dwarf white star which is really hot, then a neutron star, and finally, a black hole.
The sun is neither a supernova nor a white dwarf. The sun is a main sequence star. A supernova is not a kind of star: it is the explosion of a massive star.
I think that it would be to hot to live on earth and we would have never existed
Not quite sure what the intended question was - - - which star are you asking about? The sun IS a star - the one our planet orbits.
White - it defines white for us.
The obvious reason is that the specific star has bigger density compared with the Sun. For example, that star could be a "white dwarf star". A white dwarf mostly contains "electron degenerate matter", which is very dense. A white dwarf is a small dense star.
The sun I think
It will explode as a supernova and fade away, leaving a neutron star or a black hole. That's only if the star is "high mass". For low mass stars like our Sun there's no explosion. This type of star will become a white dwarf star.
it goes boom
It should become a white dwarf star.
NO, the Sun is not the hottest star. The hottest stars are the blue and white ones. The Sun is a medium sized star. The reason we find it so hot is because it is the nearest star to us