Why does Earth have two moons after the season finale? After the closing credits of episode 10 of Devilman: Crybaby, the series ends on an image of a reformed Earth with two moons.

Why does Earth have two moons at the end of Devilman: Crybaby?
The two moons are the two halves of the old moon split apart in the final battle.

This happened during the season finale but can also be seen in the ending credits and is alluded to in the opening. It holds symbolism for the main conflict of the show between Akira and Ryo. It also ties in with other works in the series as mentioned by @Sn0wCrack.