Thermonuclear Supernovae: Prospecting in the Age of Time-Domain and
  Multi-Wavelength Astronomy
  We show how new and upcoming advances in the age of time-domain and
multi-wavelength astronomy will open up a new venue to probe the diversity of
SN~Ia. We discuss this in the context of the ELT (ESO), as well as space based
instrument such as James Webb Space Telescope (JWST). As examples we
demonstrate how the power of very early observations, within hours to days
after the explosion, and very late-time observations, such as light curves and
mid-infrared spectra beyond 3 years, can be used to probe the link to
progenitors and explosion scenarios. We identify the electron-capture cross
sections of Cr, Mn, and Ni/Co as one of the limiting factors we will face in
the future.
