These are really two different use cases, and one head usually won’t be ideal for both.

For smooth video pans, a fluid video head is the right choice because it’s designed to give controlled, even motion. One community recommendation was a Manfrotto/Bogen 501HD head on 3046 legs, though lighter legs may be preferable if portability matters.

For long-exposure star photography, a standard tripod head can hold the camera steady, but if you want to track the stars during longer exposures, you need a tracking head or star tracker that compensates for Earth’s rotation. That’s a more specialized astrophotography setup.

So the practical answer is:

• use a fluid head for landscape video panning
• use a solid tripod for night photography
• add a tracking head/star tracker if your star exposures require tracking

If you want one tripod to support both, choose sturdy legs that can handle a 7D with a 70-200mm f/2.8, then pair them with the appropriate head for each task.