Alright some people that seen the halo 3 legendary ending might wonder "What planet did he land on" Well the answer is Reach.If you beat halo rech and seen the full ending and looked closly you may have noticed a date that said "2580 (or something like that" Which is over 2 Decades after the events of Halo 3,and you also may have noticed that half of a frigate that looks exactly like the half of a frigate Master Chief was on at the end of Halo 3.Another reason I know that Chief landed on Reach was if you looked real closly at the "Mysterious Planet" at the end of Halo 3 it looks EXACTLY like reach.