Question

3. Describe how the relative proportion of hydrogen, helium, and heavier elements will change as the sun ages.

Answer 1

Answer:

See below

Explanation:

After the red giant phase, the Sun will lose its outer layers leaving behind its helium-rich core (called white dwarf), which will gradually cool over the lifetime of the Universe. In stars more massive than the Sun, after the red giant phase. it becomes essentially a free-for-all for creating heavier and heavier atoms. As soon as the helium in the core runs out, the star collapses again, heats up, and starts fusing carbon and oxygen into larger atoms. If the star is massive enough, this keeps happening until iron is fused. At which point a hotter core still won't lead to fusion. The star collapses, becomes unstable, and POW. Explodes, forming a supernovae and neutron star (or black hole).

Answer 2

Answer:

The fusion of hydrogen makes helium in the Sun and as it collapses in the core internally it starts fusing heavier elements and transforms into Red Giant star.  

Explanation:

Almost all the stars in the universe is considered the main stream star as the atoms of hydrogen in its core fuses and forms helium . The longevity of these stars is dependent on the amount of materials in it or the massiveness of the star.

As the hydrogen fusion takes place in sun it helium is produced, the large helium atoms then converts into large atoms. However, the core of the sun starts fusing heavier elements as the sun ages and takes the form of Red Giant star.