Astra (ship)

The Astra is the spaceship that the Group B-5 use to return home from deep space. The name was given by Kanata Hoshijima, who got the idea from a plaque placed on the ship that said: "Ad Astra, Per Aspera" (Latin for "To the stars, through difficulties").

Even though the Astra is an older ship, it does have faster than light capability.

According to Polina Livinskaya, the spaceship's actual name is Ark XII, which was supposed to be used for exploration in deep space to find a suitable planet to replace Earth before an asteroid hit it.

After the group returns to Astra, the ship is put in a museum, as it's a relic of the old era. Seven years later, Kanata manages to save up enough money to buy it, and he, along with Zack and Charce, set out on it once again to explore space.