rogue planet

Noun

 * 1)  A planet that flies through interstellar space and lacks a star to encircle.

Translations

 * Finnish: tähtienvälinen planeetta, vapaa planeetta
 * German: Einzelgänger-Planet
 * Portuguese: planeta interestelar, planeta desgarrado
 * Swedish: ,
 * Turkish: serseri gezegen, yetim gezegen, yıldızlararası gezegen