Astroquizzical: Do all planets rotate in orbit around their stars?

If so, how come? And if not, what are the exceptions?

Do all planets rotate as they go around their stars? Do they all rotate in the same direction (e.g. clockwise or anticlockwise?) Or does it just depend on what started them rotating in the first place?

Before we can expand our thinking out to “all planets”, the easiest way to start looking at planets and how they rotate is to look at our own solar system, which we can investigate in far more detail (and far more easily) than anywhere else in the Universe. What we see in our own solar system is that all of the major planets are rotating around their own internal axis.

We’re well acquainted with the rotation of the Earth, even if we haven’t thought about it in this way — the Earth’s rotation is what creates our days. As a result, we all know how long it takes for the Earth to rotate once — 24 hours. But 24 hours isn’t the rule within our solar system; in fact, of all the other planets, only Mars rotates at a similar speed. Mars completes one rotation in 24 hours and 40…