Downvotes being visible is possible throughout lemmy because the voting is federated and therefore public. Whether downvotes show depends on whatever frontend you’re using, so your mobile app or your instance’s web view. There has recently been an update that changed how votes are displayed, so it’s possible your instance has updated to that.
I was about to say I think it’s 250 million years for a full orbit, but then I did basic maths and realised 125 million for half an orbit obviously checks out.
Kinda weird to think that the last time we were here in our orbit, the dinosaurs were first appearing.