I am working on a game where the player is one of very very few people who own spaceships capable of jumping between planetary systems. Different planets have vastly different technology, but roughly 50% of them are just slightly beyond the technology level we possess in real life right now. Others only possess older technology level anywhere from "modern" to stone-age.
I need a term for planets with our current technology level without implying it's the most up-to-date. I could just name them something abstract, but I want players to understand what the term means without having to be told.
What is a term I could use here that doesn't imply the planet's technology is up-to-date and that players would understand intuitively?