明星ギャラクティカ (Myōjō Galactica) is a VOCALOID pop track by producer NayutalieN (ナユタン星人), performed by Hatsune Miku, that debuted in maimai DX with the Splash version on October 1, 2020. The song originally appeared on NayutalieN's 2018 album ナユタン星からの物体Z (Object Z from Planet Nayutan), and its title marries 明星 (myōjō, "bright star" or the morning star Venus) with ギャラクティカ (galactica), establishing the cosmic love theme that runs through every bar of the track. Musically, the song is built around a bright, driving synth-pop arrangement at 154 BPM, with Miku's vocals gliding over a danceable beat. The lyrics paint a nightscape of falling stars, entwined hands, and a galaxy that sparks between two lovers, punctuated by a buoyant "パッパッパーヤ" refrain. It is categorized under niconico & VOCALOID in the maimai song list, consistent with NayutalieN's status as one of the prominent VOCALOID producers on the Nico Nico Douga platform. The MASTER chart (level 12, constant 12.4) was designed by 隅田川星人 (Sumidagawa Seijin), whose alias is a direct nod to the artist name, substituting the Sumida River for NayutalieN's fictional planet, reinforcing the song's interstellar identity in the charting itself. The EXPERT chart (level 8+) was handled by はっぴー (Happy). Across all four DX difficulties, the note counts range from 203 (Basic) to 720 (Master), with the MASTER chart standing out for its dense Slide and Touch note usage that mirrors the song's shimmering, starry texture.