Lets one calculate the sidereal period of the planet (P) from the synodic period (S), and vice versa.

This calculator takes in **positive decimal numbers**. The result will not be
calculated if an
invalid input is entered.

If the result calculated is an infinity value or a negative value. "Ouch!" will be displayed as a result.

See github.com/ccnmtl/astro-interactives for more info.

This a question modal.