Humanity is a "resident" rather than "owner" in the universe.
As long as death exists, and it is a fact, we can't be owners.
As for other religions saying that the universe is small and only what we see, Islam says otherwise:
Sura 51, Page 522, The Quran
( 47 ) And the heaven We constructed with strength, and indeed, We are expanding.
Furthermore; it's saying about whoever visits the cosmos:
Sura 15, Page 262, The Quran
( 14 ) And [even] if We opened to them a gate from the heaven and they continued therein to ascend,
( 15 ) They would say, "Our eyes have only been dazzled. Rather, we are a people affected by magic."
As long as death exists, and it is a fact, we can't be owners.
As for other religions saying that the universe is small and only what we see, Islam says otherwise:
Sura 51, Page 522, The Quran
( 47 ) And the heaven We constructed with strength, and indeed, We are expanding.
Furthermore; it's saying about whoever visits the cosmos:
Sura 15, Page 262, The Quran
( 14 ) And [even] if We opened to them a gate from the heaven and they continued therein to ascend,
( 15 ) They would say, "Our eyes have only been dazzled. Rather, we are a people affected by magic."