1 限量版发售的planetarianCD/PS2版本里有一本243页的小说，包含了4个发生在本作故事前后的故事 雪圏球， エルサレム，星の人，チルシスとアミント
"Constellations. Words. God. Robots. A collection of short stories in the key of these four themes."
- from the frontmatter of the book
The book is a 243-page collection of four short stories set in the universe of planetarian, as well as a prologue and an epilogue. It was originally bundled with the limited edition of the CD version of planetarian, and is also being included in the limited edition of the PlayStation 2 version of the same. Two of the stories presented fall before the events of the kinetic novel, and two of them happen in the aftermath.
情节（就不翻译了，很好懂。。）：
Snow globe (雪圏球 (スノーグローブ))
This story occurs before the events of the Great War that brought the world to ruin; at this point, Reverie Planetarian has been working at the Flowercrest Department Store's rooftop planetarium for about 10 years. One day, Reverie begins to act strangely, culminating in her simply walking out and wandering around the town. All the staff of the planetarium are bewildered, and one of the workers — a woman named Satomi Kurahashi — is ordered to go follow Reverie and bring her back. Before long, Reverie begins to run out of battery power, and then...
Jerusalem (エルサレム)
This story occurs as the Great War reaches its height. The South American Unification Army receives reports of a rogue sniper operating deep in the jungles of Patagonia, and sends a platoon under the command of Master Sergeant Murdock to neutralize the threat. However, the entire platoon is killed off one by one by the sniper, until only Murdock is left. All alone, Murdock catches a glimpse of this mysterious sniper through his binoculars — and is shocked to find that he gazes upon the figure of a beautiful nun.
Homo Planetariens (星の人)
This story occurs some time after the events of the kinetic novel, as the human civilizations struggle in a losing battle against the poisonous rain. Three of the last inhabitants of a nearly-abandoned underground fallout shelter — named Levi, Ruth, and Job — find a quaint old man collapsed in the snow outside the bunker. When they bring him down, they are surprised to hear the adults of the shelter calling him "Homo Planetariens". The children grow quite interested about this strange nickname, as well as the fact that they have never seen a visitor from the outside world. The old man recovers a bit, and then has the children help him in putting together a certain device. It is only after this that the story that was begun in the kinetic novel comes full circle.
Tircis et Aminte (チルシスとアミント)
Tircis and Aminte, identical twins, study alone in a world all of their own. But then, suddenly, a thought comes to Tircis: "what am I studying for? How long will this go on?" This is the story of how the answer reveals itself to Tircis and Aminte.
2 卡尔-蔡斯公司是著名的光学仪器制造商，1846年成立于德国的耶拿。耶拿小姐的名字由此而来（实际上她是蔡斯的Mk.2型投影机）
3 主题曲在各国有很多的版本
印尼：Kulihat Ibu Pertiwi
西方国家：What a Friend We Have in Jesus 貌似是宗教歌曲
