Canvas: synchronous circular movement, perhaps?

Question

JavaScript

Is it possible and how best to implement the movement of objects in a circle (very similar to the solar system, with only one orbit and 3 planets) - with equal speeds,
i.e. the "planets" are moving uniformly from their positions at the same speed...
the only problem is understanding how to place these planets and how to make them move along the edge of the circle.

Answer 1

HTML (taken from here )
Canvas (taken from here )

Answer 2

Take Crafty.js and it's done in 5 minutes.