Saturn's moon - Titan - has a tilt that scientists are trying to understand

To this point, scientists can't figure out why Titan is "wobbling."

"We think some event in the past may have knocked the atmosphere off its spin axis, causing it to wobble."

While studying it using telescopes and looking at the data from probes, they noticed that Saturn wasn't impacting the tilt, which made the result curiouser.

"That would've given us clues to the cause," Nick Teanby, co-author of the study and a planetary scientist at the University of Bristol, said in the statement. "Instead, we've got a new mystery on our hands."

Its amazing to me just how much we don't know.  But its also worth noting that this is what's great about scientific curiosity.  We continue to evaluate what we see, and update theories to adapt to that.  And we continue to learn new things.

https://www.space.com/astronomy/solar-system/weve-got-a-new-mystery-on-our-hands-titans-weird-wobble-just-got-even-stranger