It is a relatively young nebula and has a core diameter of only about 0.4 light years.
==Glej tudi==* Pametna očala* Naglavni vizir* EyeTap* Virtualni retinalni monitor* Računalnik v obleki==Sklici in reference====Zunanje povezave==* Rochester Archives Article—'Buccaneer HUD PDU'* BBC Article—'Pacman comes to life virtually'* 'Clinical evaluation of the 'head-up' display of anesthesia data'*'When will the Head-up go Civil' – "Flight" 1968 archive*'Elliott Brothers to BAE SYSTEMS' – a short history of Elliott Brothers*"Head-up Over the Hills" – a 1964 "Flight International" article on flying using an early Specto head-up display