Describe what the internal structure of the Sun looks like, ...

[misspop]

Describe what the internal structure of the Sun looks like, indicating what physical phenomena are occurring there. In what respects (internal structure, energy generation, etc.
 
  ) does the internal structure of a high mass Main Sequence star differ from that of the Sun?

Question 2

Why is iron significant to understanding how a supernova occurs?
 
  A) Iron is the heaviest of all atomic nuclei, and thus no heavier elements can be made.
  B) Supernovae often leave behind neutron stars, which are made mostly of iron.
  C) The fusion of iron into uranium is the reaction that drives a supernova explosion.
  D) Iron cannot release energy either by fission or fusion.

[Danny Ewald]

Answer to Question 1

Nuclear fusion via the proton-proton cycle occurs in the core. The center of the core is rich in non-fusing helium. A high mass Main Sequence star looks similar, except the nuclear fusion uses the carbon-nitrogen-oxygen cycle.

Answer to Question 2

D

[misspop]

Thanks for the timely response, appreciate it

[xiaomengxian]

Wow, this really help