Bumpy Spheres

Good evening,

I am experimenting for some days now with some space settings. I have made a star and a planet, together with a skybox.
Mostly worked with materials which I use together with the sphere model from the starter content. Thats how it looks at the moment:

Now, what I don’t understand is how can I archive that my spheres looks not bumpy?
Somehow I did not find anything while searching but maybe I just did not find the proper words.

I hope I am writing this at the proper section of the forum. Thanks in advance!

Sincerly,

Either use tesselation on the sphere or make a sphere with more polygons.