Why can’t we iterate with *ngFor in a static Array (formArray)

I got a static variable as :

static params = new FormArray([]);

and i call it this way :

<div *ngFor="let param of params; index as i"> ... </div>

But i have the following error displayed :

Property ‘params’ is a static member of type ‘SeeDataFrameComponent’

So why can’t we iterate with *ngFor in a static Array (formArray) ?

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