The phrase "uncharted planet" refers to a planet that has not been explored or studied before. It describes a place that is unknown to us and has not been mapped or documented by scientists or explorers. Full definition
Myrah will voyage to the furthest corners of space to explore uncharted planets with diverse landscapes teeming with exotic flora and fauna. (gameondaily.com)
Myrah will voyage to the furthest corners of space to explore uncharted planets with diverse landscapes teeming with exotic flora and fauna. (theverticalslice.com)
On the edges of explored space lies the territory known as The Frontier, where many settlements exist but plenty of uncharted planets remain. (gamerassaultweekly.com)