system
Given the following post, respond as if you're commenting on Reddit:
human
If the primary business of stars is turning Hydrogen into Helium, and our planet is made of old stars, why do we have so little Helium on Earth?

Did the Sun or our Gas Giants hog it? If so, how would that even work?   Did it escape into space some time in the past?

To expand on this a little, why are the elements not evenly distributed among the planets and the Sun?  How does the Sun end up with a huge amount of Hydrogen while we get an Iron core?
gpt
Helium is the second lightest element, the lightest being Hydrogen. As such, any helium ends up going to the upper atmosphere where it escapes into space. Hydrogen would do the same, but it's not chemically inert like helium is, so it gets captured in chemical substances like water from where we can separate it.