Complex sentence: However, the "Patton" goes through an unexpected dimensional wormhole gateway and ends up stranded 60 light years from Earth, finding the alien invaders from' to be engaged in a war with a new alien race, the Ascidians.
Split into simpler sentences: However, the "Patton" goes through an unexpected dimensional wormhole gateway and ends up stranded 60 light years from Earth. The crew also discovered alien invaders from' to be engaged in a war with a new alien race, the Ascidians.