perfectly reasonable explanations

...are hard to come by for some things

...Stars born in the generation of our Sun have an expected abundance of elements heavier than hydrogen and helium mixed into their atmospheres. Stars born in the generation before our Sun, Population II stars, the stars that created most of the heavy elements around us today, are seen to have some, although fewer, elements heavier than H and He. Furthermore, even the elusive never-seen first stars in the universe, so-called Population III stars, are predicted to have a large mass and a small but set amount of heavy elements. Yet low-mass Milky Way star SDSS J102915+172927, among others, appears to have fewer metals than ever predicted for any stars, including at least 50 times less lithium than came out of the Big Bang...

Stars radiate because they fuse hydrogen into heavier atoms.



Stars are elemental factories. Barring the active removal of heavier elements, there is no way this star should exist. Given how we understand the facts, that is.

But exist it does, and once again, we see the universe is not only stranger than we suppose, it's stranger than we can suppose.