Question

write 15 facts on super nova explosion

Answer 1

. Supernova is nothing but a stellar explosion. To put in other words, it is actually an explosion of a star.

2. So massive is the explosion that for a brief amount of time, the explosion actually outshines the entire galaxy in which it explodes.

3. Whenever an explosion takes place, energy is emitted and supernova is no exception. The amount of energy radiated in one supernova explosion is equal to the amount of energy that has been radiated by our Sun so far plus the energy that it will radiate for the rest of its life.

4. A supernova is so bright that it literally takes weeks and sometimes months for the brightness to fade away.

5. During this explosion, luminous radiations are burst out and almost all of the material of the exploding star is expelled in outer space.

6. The material that is expelled from the exploding star travels at a very high speed of 30,000 kilometers in one second.

7. This explosion sends out a shockwave in nearby outer space. The outer space that we keep saying is actually referred to as interstellar medium which is defined as matter that exists in space between stars within a galaxy.

8. As this shockwave travels through this interstellar medium, the gas and dust from the exploding star are bound by the shockwave and it continues to expand. This expanding structure is known as supernova remnant.

9. Every time a supernova explosion takes place, the interstellar medium is enriched by elements of higher mass.

10. Not every star explodes. For instance, our Sun (which is a star) will never explode. Stars that are 10 to 100 times bigger than our Sun eventually explode and create a supernova explosion.


11. When a massive star eventually runs low on hydrogen (the fuel that is converted to helium through fusion reaction), the remaining hydrogen pushes outwards towards the shell, surrounding a helium core.

12. When the hydrogen moves to the outer shell around the helium core, the star becomes unstable and the outer shell is enormously inflated, converting the star into a red giant.

13. At this stage, the hydrogen in the outer shell of the red giant still fuses into helium producing thermal energy which wants to expand the star.

14. The helium core on the other hand exerts gravitational pull attempting to crush the star.

15. When the remaining hydrogen burns out, gravitational pull of the helium core wins and helium atoms start fusing to form iron atoms, thus forming an iron core inside the helium shell.