Answer: Non-testable
Step-by-step explanation:
Scientific theories is the explanation for the factors responsible for the natural phenomena or natural event. This explanation is based upon the data obtain after the implementation of methodology.
Several theories based upon the formation of solar system are non-testable as we human beings were not originated on earth when the solar system developed. There is no direct evidence which can be related to the formation of the solar system. Experimental analysis for the formation of solar system has been undetermined. Therefore, the theories related to the formation of the solar system have been non-testable.