God created the universe, all the stars, planets, and things that live on them.
On Earth creation fell. God sent part of himself, Jesus, to redeem creation. Jesus died and was risen, and all who believe in him are reconciled with God.
What if God created life on other planets. Since only God is perfect, that part of creation would have fallen away from God as well. But unlike here on Earth, God wouldn’t need to send a savior. Jesus already died to redeem all creation. Instead God would need to reveal Himself to the people of this other world and somehow share his redeeming work with them.
Hathrae is one of those other planets.