exchemist
Veteran Member
I've just told you: all the elements heavier than hydrogen and helium evolved due to nuclear fusion. But OK you probably don't know enough science to know what "heavier" means. It includes oxygen and carbon. It includes every other element. Hydrogen and helium are the lightest of the elements, you see.What about Oxygen and carbon, were they existed or evolved?
Don't you think that the nebula consists of other elements than Hydrogen and Helium?
My point is that these nebulae are only produced at the end of the life of a star. So at the beginning, when the cosmos formed and when our galaxy first formed, there was only hydrogen and helium. So no dust. By the time - far far later - that our solar system formed, it was a different story.