Gamma-ray observatories are specialized facilities designed to detect and study gamma rays, the highest-energy form of electromagnetic radiation. These observatories use advanced instruments, such as telescopes and detectors, to observe cosmic events like supernovae, black holes, and neutron stars. By capturing gamma rays, scientists can gain insights into the most energetic processes in the universe. These observatories can be ground-based or space-based. Ground-based observatories, like the HESS and VERITAS, use large telescopes to detect secondary particles produced when gamma rays interact with the Earth's atmosphere. Space-based observatories, such as the Fermi Gamma-ray Space Telescope, avoid atmospheric interference and can observe gamma rays directly from space, providing a clearer view of the cosmos.