Neatly explains why orbits around Earth are only ~90 minutes, because the Earth's iron-nickle core has a higher density than rock (10-13 g/cm^3). Anyone got a

Neatly explains why orbits around Earth are only ~90 minutes, because the Earth's iron-nickle core has a higher density than rock (10-13 g/cm^3). Anyone got a Threadreader link? I can only see the first post.