Celestia Forums

I was looking at the orbits of the planets around Sol, which have always been identical in terms of tilt (when viewed from a certain angle, the orbits look like a single line).
One day, for some reason, the orbits suddenly became uneven in tilt. See the attachments for examples.

Is this a bug, or did I likely do something to screw it up?

It's not a bug or a glitch or a problem. The orbits of the planets really are tilted like that. They do not orbit the sun in a perfectly flat plane.