Can you start missions/strikes/raids whatever from within the world? Or do you always have to go back to the main menu (aka "the orbit") to start a mission or strike? It would be really lame if you can't start missions from within the world and always have to fly into orbit and back to the planet again. That would basically be the same as quitting the game/mission and starting a new game/mission like it was in Halo (even including the pretty long loading times for both quitting and starting). This would totally break the immersion and counteract Bungie's vision of being in a seamless world.