I want to animate a scene in deep space using the Orbit volumetric atmosphere, far away from a ground plane. I delete the ground but I still get some form of lower atmosphere layer. How do I get rid of that so that no matter where the camera points, I see stars against a black background?

Aim the camera as shown and bring fog and haze to "0"

Vue will hold fog and haze at the horizon so sometimes just deleting the ground plane is not much help. If you go into the atmosphere editor fog/haze tab and set the fog and haze at zero then sky tab and set the fog in the sky thickness to zero and max. Altitude at zero you can delete or tilt the ground plane out of the way and not have to move the camera this way your objects maybe easier to center when applied to the scene. Thanks for asking this was a very good question. Regards.