Shoujo Seikan Hyouryuuki

A horse-drawn carriage-shaped spaceship travels through space, carrying Ridley, the scientist who designed it, and her quiet companion, Watari. They have left Earth, now unfit for life due to pollution, in search of a new home. As they visit various planets, each one presents unusual characteristics: one ruled by a deity capable of reviving all things, another that honors the luckiest individuals, and yet another filled with endless libraries. These bizarre environments often surprise the pair. Their journey continues as they explore the galaxy, hoping the next planet might be suitable for settlement.