Blocking sunlight from atmosphere / changing sun disk image

Hello! I am new to unreal to please be specific if you can.

I am trying to simulate a large space station closing around the sun itself as seen from earth. To do this, I will either need a physical sun object that I can interact with while also having the light interact with the sky atmosphere, some way to block light from the sun in certain places before it reaches the atmosphere, or be able to change the image of the Directional light that is acting as the sun.
I’ve tried placing large objects outside of the atmosphere in the way of the sun but that does not seem to do it.

Is this something that’s possible? Is there something simple I’m doing wrong?

Thanks in advance.