Monthly Mystery by The Escape Game

Cosmo made it all the way to ✨Forgotten Pluto Station!✨

He snapped a few pics of the exterior, but can’t seem to find a way to unlock the door.

Monthly Mystery by The Escape GameMonthly Mystery by The Escape GameMonthly Mystery by The Escape GameMonthly Mystery by The Escape Game

lowercase, 6 letters

💡Need help?💡

Hint #1