The following figures represent the evening and the morning star - Kopu, Tarewa and Marewa are different names for the same star. Ko Tarewa i te po (the evening star as i have been taught), Ko Marewa i te ata (the morning star as i have been taught) and Kopu (another name perhaps when it is at its zenith from our perspective). Yet another name is Meremere-tu-ahiahi.
Just remembered another name: te Kopu rereata