Large LEO constellations and multi-orbit satellite systems have recently emerged as complex network architectures that provide and enhance a range of satellite services e.g. ubiquitous broadband internet, direct to handheld, satellite IoT etc. The current talk reviews the current capabilities of such systems from a communication perspective and describes the challenges of applying key technological enablers in space. In addition, we present a vision about future research topics of long-term importance in the area of Satellite Communications and Non-Terrestrial Networks. Speaker(s): Prof. Symeon Chatzinotas, Dr. Gunes Karabulut Kurt Virtual: https://events.vtools.ieee.org/m/379147