Whitepaper #012 in the Decadal Survey for Solar and Space Physics (Heliophysics) 2024-2033. Main topics: basic research. Additional topics: solar physics; space-based missions/projects; emerging opportunities.
Cool plasmas embedded in a larger, much hotter medium are ubiquitous in different astrophysical systems such as solar & stellar coronae, the CGM, ISM and ICM media. These cross-disciplinary possibilities call for a high-resolution multi-wavelength imaging and spectroscopic solar instrument able to capture the multithermal, dynamic and pervasive nature of the multiphase plasma in the solar corona.