As part of the Decadal Survey on Astronomy and Astrophysics (Astro2020), the Panel on Compact Objects and Energetic Phenomena will identify and articulate the scientific themes that will define the frontier in research of compact objects and energetic phenomena in the 2022-2032 decade. Its scope will include white dwarfs; neutron stars; pulsars; magnetars; stellar mass black holes; compact binary systems; novae; supernovae; gamma-ray bursts; fast radio bursts; physical processes and accretion onto supermassive black holes; and gravitational radiation and high-energy particles and radiation from astrophysical sources.