Which one is it?

Identifying: Planets

We live on a planet. Probably not the same one as you, but a planet nonetheless. Arguments are currently raging as to what is, and what is not, a planet. Well, Mrs. WhichOneIsIt reckons that if it’s bigger than an average market town then it’s a bloody planet. And we’re with you on that one dear. Full marks and all that. A gold star for the chart on the fridge. Woo. And, in fact, Yay!

And, notice how we resisted the temptation to make jokes about Uranus - Mrs. WhichOneIsIt said we’d look like arses if we did, because we’re not schoolboys anymore.

Objects shown below are: TO SCALE (more-or-less).