What happens when one planet orbits another, which itself is orbiting a star? The result is mesmerizing mathematical curves called epicycloids. This interactive tool visualizes these "planetary orbital patterns" - imagine a small planet (red dot) orbiting a larger planet (orange dot), which orbits a central star. The red planet traces out intricate mandala-like patterns, creating different shapes based on the ratio of orbital speeds.

change v1/v2 to get different patterns

build with d3js, Bulma css, all in one single html