Hoshizora Planetarium

 is Ange☆Reve's first CD, fourth major, and sixth overall single. It was released on November 29, 2017.

Tenshi Edition CD

 * 1) Hoshizora Planetarium (星空プラネタリウム)
 * 2) Unmeiteki% (運命的%)
 * 3) Hoshizora Planetarium (Instrumental)
 * 4) Unmeiteki% (Instrumental)

Datenshi Edition CD

 * 1) Hoshizora Planetarium
 * 2) Tasogare Daite, Kimi wo Omofu. (黄昏抱いて、君ヲ想フ. )
 * 3) Hoshizora Planetarium (Instrumental)
 * 4) Tasogare Daite, Kimi wo Omofu. (Instrumental)

Limited Edition CD

 * 1) Hoshizora Planetarium
 * 2) Unmeiteki%
 * 3) Tasogare Daite, Kimi wo Omofu.
 * 4) Hoshizora Planetarium (Instrumental)
 * 5) Unmeiteki% (Instrumental)
 * 6) Tasogare Daite, Kimi wo Omofu. (Instrumental)

Limited Edition DVD

 * 1) Hoshizora Planetarium (Music Video)
 * 2) Hoshizora Planetarium (Dance Shot Movie)

Featured Members

 * Sasaki Rika
 * Tachibana Haruka (last)
 * Matsuwaki Akari
 * Yoshihashi Arisa
 * Saigo Mizuki
 * Mizuno Yua
 * Gonda Natsumi (promotion only)

Trivia

 * Gonda Natsumi is not included in the single, however, she appeared during the single's promotion events.
 * The song was introduced before Watanabe Kurumi left the group. In the recording, Akari and Mizuki took her lines, however, Natsumi took them during lives.