お七夜[oshichiya] name-giving ceremony
七つ[nanatsu] seven
七つの海[nanatsunoumi] the seven seas
七屋[nanatsuya] pawnshop
七回忌[shichikaiki] seventh anniversary of a death

七角形[shichikakkei] heptagon
七曲がり[nanamagari] tortuous or spiral (path)
七月[shichigatsu] July
七賢[shichiken] the Seven Wise Men (of Confucius's Analects)

異星人[iseijin] alien (from another planet)
一つ星[hitotsuboshi] evening star
１等星[ittousei] first-magnitude star
衛星[eisei] satellite
衛星地球局[eiseichikyuukyoku] (satellite) earth station

衛星放送[eiseihousou] satellite broadcasting
火星[kasei] Mars (planet)
火星人[kaseijin] Martian
海王星[kaiousei] Neptune (planet)
巨星[kyosei] giant star