Harpalyke articles
Deeper dives into Harpalyke, sourced from NASA, JPL and the scientific literature.
How the Ananke group formed
One captured asteroid, one impact, and a family of small backwards moons — including Harpalyke.
Read →Why do Jupiter’s distant moons go backwards?
Hill spheres, stability and capture — the physics behind Harpalyke’s reversed orbit.
Read →Harpalyke’s grey colour and what it might mean
A small colour difference that complicates Jupiter’s moon family tree.
Read →