Unity buggy shadows on large objects.

I have a sphere scaled with factor 1000 and a cube scaled with factor 1, both in all axes. Now when I place the cube above the earth and I zoom in I get this weird things, while I’m just using a blank, White material:

Those “things” that make my huge sphere look like sand at the bottom middle get bigger when I make the sphere bigger, but it starts at around 100. What is this and how do I get rid of this? Thanks

The sphere is likely casting shadows on itself due to depth buffer precision issues. Try increasing the near-clip plane value on your camera.