Celestial can still celebrate the Taum's 5th anniversary, even in space~
Those balloons are escapee balloons from parties, that floated their way to space, like in the Brave Little Toaster.

For the Taum celebration artwork event, 1 out of 3

Taum 5th Anniversary Celebration Artwork Event
https://maresy.deviantart.com/journal/Taum-5th-Anniversary-Celebration-Artwork-Event-702967755

Art and oc are mine, LovelyEchos
Taum species Happy-sorry