The ark is where you access the final boss, The Heart of Ruin, by gathering the 6 different artifacts from 6 different races. Esther starts you on these quests.

Gallery

A small camp can be found inside the Ark.

One of several "holograms" found in the Ark. This one shows a strange figure holding a few celestial bodies.

Some sort of cosmic horror destroying several planets.

The same horror being pushed back into some sort of void.

The six races, seemingly holding something of importance. Curiously the Novakids are missing...

The Ark's "Gate". What could be behind this is anyone's wonder...

The dev screenshot deciphered.

A dev screenshot with the 8th face

The translated ruins, as of right now.