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High-energy photons from space are created in the most violent processes
in the universe and are unique and powerful probes for astrophysics and
for fundamental physics in extreme conditions. With the efforts of
dedicated scientists, it took decades to make it possible to do
astronomy with high-energy photons, i.e. gamma rays. During the last
decade, the state-of-the-art gamma-ray experiments around the globe have
given an enormous boost to this field through exciting discoveries of
several astrophysical gamma-ray sources such as supernova remnants,
pulsars, active galactic nuclei, binary systems. In the very near
future, the "Cherenkov Telescope Array" (CTA) with an unprecedented
performance will provide a significant advancement of the understanding
of these sources and a huge potential for discoveries of the unexpected.
This talk illustrates this fascinating young branch of astronomy along
with some key science results. |