Title: Hidden in the dark: the low surface brightness Universe

Abstract:  One of the last remaining frontiers in optical/near-infrared
observational astronomy is the low surface brightness regime. This is
the universe with the lowest density of stars, largely unknown to
previous surveys such as the SDSS. Studying this regime promises to
provide transformative insights into our knowledge of star formation in
low-mass galaxies, the hierarchical structure of galaxies and galaxy
clusters, and the ultimate nature of dark matter. It plays a crucial
role in completing our overall understanding of galaxy evolution and the
physics of our Universe, as our theoretical models are calibrated to
reproduce only a minority of objects and structures.
The study of this field has gained momentum over the last 20 years,
thanks to technological and data processing advances that have allowed
us to reach unprecedented observational depths.

 In this talk I will discuss two recent results that show how ultra-deep
imaging is accelerating our ability to discover new objects and

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