Below is a list of some of the 'millions of worlds' mentioned in the Dune novels. For information on important stars in the Dune novels refer to the Stars page.
It is worth noting that none of the planets explored or inhabited by humankind featured advanced 'alien' civilizations. The only advanced beings in the known universe were natural humans, genetically-modified humans, or automatons that were created by humans.
- Caladan, also known as III Delta Pavonis, later renamed to Dan