"Once the distinct kinematic components of the Galaxy had been isolated, an interesting fact arose in that the chemical composition of the stars in those components also varied in a regular manner. Disk and bulge stars tend to be rich in heavy elements (above helium on the periodic table). Halo stars tend to be very poor in heavy elements" (http://abyss.uoregon.edu/~js/ast123/lectures/lec10.html) emphasis mine.
So the hypothesis is at least supported in some way. But what is it about the structure of our universe that results in the metallic or terrestrial bodies being closer to the source of gravity? Simply gravity itself? The heavier an object is, of course, the closer it will approach the gravity source, makes sense. Is there something more to this than just heavier elements gravitating toward the gravity core?
No comments:
Post a Comment