This issue is simply too interesting for me to go unnoticed. Imagine the core of worlds made of diamonds. With enough pressure, it's possible! And there's plenty of ways that pressure is generated in the universe.
Now the cover art is also worth taking a look. Do you notice anything unusual with the ringed planet in the background? Aside from the beauty of it, take a look at how many rings that huge planet has. It has got 3 rings! Multi-layered rings? Is that possible? I hope some Astrophysicist writes up an ArXiv article about the possibility of it because it's beautiful! Or perhaps is it too good to be true?