During the past years we have carried out experiments in very high
time and space resolution in Astronomy by means of novel utilizations
of the properties of light.
Regarding time, we have conceived a photometer capable to time tag the
arrival time of each photon with a resolution and accuracy of few
hundred picoseconds, for hours of continuous acquisition and with a
dynamic range of more than 6 orders of magnitude. The final goal is a
"quantum" photometer for the E-ELT capable to detect and measure
second order correlation effects (according to Glauber description of
the EM field) in the photon stream from celestial sources. Two
prototype units have been built and operated, one for the Asiago 1.8m
telescope and on for the 3.5m NTT.  Results obtained on optical
pulsars will be presented. 
Among the second order effects, Hanbury Brown Twiss Intensity
Interferometry has been already successfully tested at the NTT, giving
hopes to perform very high spatial resolution observations among
telescopes not optically linked, e.g. the E-ELT at Cerro Armazones and
the VLT at Cerro Paranal, or Cerenkov light telescopes such as Magic
or CTA.
A second avenue for high space resolution is being explored using the
Orbital Angular Momentum of the light beam and associated Optical
Vorticity. The classical Rayleigh criterion of resolution can be
ameliorated by an order of magnitude. Promising tests have been made
with a coronagraph at the 122cm telescope in Asiago. Extension to the
radio domain is now under way.