The nearby (d=3.6 Mpc) starburst galaxy M82 has been studied for several
decades by very long baseline interferometry (VLBI) networks such as e-MERLIN
and the European VLBI Network (EVN). The numerous supernova remnants (SNRs),
HII regions and other exotic transients make it a perfect laboratory for
studying stellar evolution and the interstellar medium (ISM). Its proximity
provides a linear resolution of 17 pc/arcsec, enabling decadal-time-scale
variability and morphology studies of the tens of compact radio sources. In
this proceedings, we describe new techniques developed in the last ten years
that provide deeper, more robust imaging, enable in-band spectral index
mapping, and allow wider fields of view to be imaged to find new radio sources.

Cet article explore les excursions dans le temps et leurs implications.

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