the mind plays a large roll in creating and maintaining your normal conscious experience of a waking state which can't be said to be subjective or objective. The sensory organs are translating frequencies and vibrations of sound and spectrums of light to create what you call reality and the 'screen' you 'view' this on is inside the brain. Most people take the eyes to be something like windows looking at an outside world and this is not the case. So if this is how your experience of a 'normal' waking state of consciousness functions, the same properties hold true for your dream and deep sleep states. The 3 states of consciousness (waking, dream and deep sleep) all ride on top of the same awareness... and if that awareness can be cultivated through certain practices you can come to a point where you can be aware 24/7... just as aware of what is going on in your dream state as in your waking state. And able to control and manipulate your dreams to whatever you want to happen... and since the dreams don't adhere to space and time you are able to do all sorts of things.... anything imaginable... so the idea of astral projection is not out of the question.
We very well might be receptors of consciousness instead of consciousness being produced by the brain... brain produced consciousness is an idea that is part of a paradigm that is slowly starting to fade with new discoveries in the way reality manifests itself. And if this is the case that we receive the consciousness from outside then we all very well might share the same consciousness... everything might very well be consciousness... explaining how sub atomic particles are influenced by observation and intention. We are creators of reality. Don't take yourself to be a fragmented fluke fighting to survive in a world you don't belong in. Every tangible thing your can feel, or see, or hear is because you make it so. So the subtle body should very well be able project itself through the consciousness. Space, time, energy, matter, sound, light, sensations... all exist exclusively in the consciousness. Exclusively within whatever you are.