The Kwangmyŏngsŏng program is a class of experimental satellites developed by North Korea. The name Kwangmyŏngsŏng ("Bright Star" or "Brilliant Star" or "Constellation" in Korean) is from a poem written by Kim Il-sung. The first class of satellites built by North Korea, the program started in the mid-1980s. There have been five launches so far, of which two have been successful.