Yes it does. With as much power as 10 trillion of the most powerful hydrogen bombs known to man.
Supernova.
The initial explosion is over in seconds
Either somebody shoots at the star. Or kills the star turning it into a supernova.
Some stars explode in a supernova.
Some stars do. They can be nova or supernova stars, depending on the scale of the explosion.
A supernova comes to existence when a white dwarf drains the matter from any companion star up to a point in wich it cannot carry anymore, and then it will first implode, and afterwards it will explode, a supernova.
we would explode and if there were survivors they would freeze to death
Antares is a red supergiant and has enough mass to explode as a supernova and then collapse into a black hole.
They explode as a supernova/hypernova to form a planetary nebula/black hole.
A type-I supernova occurs when a white dwarf star accumulates mass from a companion star until it reaches a critical threshold, triggering a runaway nuclear fusion reaction. This causes the white dwarf to explode in a bright supernova event.
A supergiant star can explode into a supernova, where the outer layers are ejected into space. What remains may collapse into a neutron star or black hole, depending on the mass of the original star.
Percentage wise. Most stars do not explode. Only about 1 in 3 million will explode as a supernova. The rest, like our Sun will just die quietly and become white dwarfs.