The New Testament was written by folks who thought the Earth was flat and we were all there was. To assume we are the only thing He created in this vast and infinite universe is not only a tad arrogant, but a little silly too..
What would be the point of God creating others in his image on other planets?
I believe the whole purpose of the Solar System being designed as it is, is to support life on this planet in one capacity or another, in ways that mortal man will never be able to discover.
Jpb 26:10 and Isaiah 40:21&22 both refer to a spherical earth. The men who God used to write the New Testament had studied both those books throughout their lives.
It seems arrogant to claim to know more about God’s creation than Jesus Himself through His inspired word.