Question

if sun blasts or gets ended then what will happen to the planets

Answer 1

Sun will mainly blasts in two ways :
1)supernovae
2)singularity
If sun blasts with supernova, the star that form was red gaint,, then all planets become cold and freeze and gets out of orbit The Earth takes 8min after sun's supernova because gravitational wave produce by sun takes 8min to reach earth. Other planets takes different time.
If sun singularity , it creates a black hole (it takes long period of time) all plants are always in orbit but due to loss of thermal radiation and coming of cosmic rays at high level,planets become highly luminous ( the gravity of sun =the gravity of the black hole, there are many more explanation.

Answer 2

the earth would freeze and it would end as without sun light plants wouldn't do photosynthesis and humans and animals would not be able to get oxygen, therefore they'll die, after that plants would not receive carbon dioxide and, therefore the earth would no more be able to survive.