A HD version of planetarian ~the reverie of a little planet~ is now out on Steam! This marks the first time the game has been translated into a language other than English, and Key has stated that they are looking into translating it into additional languages.
It is currently available in Simplified Chinese with Japanese audio, but hopefully this could pave the way for an English edition of planetarian HD.
If you’re a Chinese Key fan, why don’t you come to the planetarium? You can grab the game from Steam for only 36RMB ($9.99) with a 20% discount in the first week.