Quantum astronomy: scientific background, technologies, achieved results, and future developments

Quantum technologies have been introduced widely in different scientific fields and some industry application have been developed. In this work we outline the history and development of a new field of Astronomy which is based on the concept of quantum mechanics and takes advantage from the technological instruments developed recently for quantum information in order to investigate new properties of the light coming from the sky. The development of this Quantum Astronomy instruments is still very active (e.g. Adaptive Optics integration) and the scientific target is pushed to new exiting limits: for example, periodic optical monitor of pulsars, lunar occultation; transit-occultations and application of the Hanbury Brown Twiss Intensity Interferometry.