An anime adaptation by A-1 Pictures began airing in Japan on April 1, 2012 and is being simulcast by Crunchyroll.[7] The series has been licensed by Sentai Filmworks in North America.[8] The 31st episode, which aired on November 4, 2012, features the first piece of voice acting to be recorded in space, performed by astronaut Akihiko Hoshide aboard the International Space Station.[9] A special episode titled "Planetarium: Space Brothers ~One Point of Light~" (プラネタリウム 宇宙兄弟～一点のひかり～, Puranetariumu Uchū Kyōdai ~Itten no Hikari~?) was screened in planetariums during Summer 2012 and was released on DVD with the 20th manga volume on February 22, 2013.[10]