Abstract :
Nowadays the easy access to large databases from very different instruments, covering a wide range of measurements in all the electromagnetic spectrum, allows to complement observations in different bands to reach a better understanding of the structure, evolution, and physical phenomena taking place in the high energy targets. Furthermore, new techniques and advanced instrumental development are opening new ways to observe the universe, mainly via neutrino detection and gravitational waves studies. Combining information and methodologies from quantum mechanics and particle physics with astrophysical observations, our understanding of the universe will highly improve.