Eli5 Why was the sun made up of mainly just hydrogen when it was formed compared to inner planets that have so many more elements, especially higher ones?

Question

All,

I have a basic understanding that a lot of elements were brought to planets by comets, supernova explosions and so on.

Why didn’t the sun attract most of these comets and fragments from celestial explosions instead of the planets? And why was / is the sun mainly just hydrogen?

In: 105

Answer 1

I am excited about recent findings about the star Betlegeuse which is about 640 light years ago. It is now believed that it is in the later stages of burning carbon before going supernova. Since it is a huge red giant and is only 10 million years old and could very well explode within a few decades. It would be bright enough to form a shadow and even be visible in daylight.