If asteroids do not emit light, a source of primordial information in Astrophysics, how are their properties studied? Karri Muinonen, professor of astronomy at the University of Helsinki (Finland), is precisely a specialist in the physical characterization of these small bodies, key to know the origin and evolution of the Solar System. For this reason, at the XXVIII Canary Islands Winter School of Astrophysics, organized by the Instituto de Astrofísica de Canarias (IAC), this researcher will explain how they are analyzed, both from Earth and from space. By Elena Mora (IAC) “Near-Earth
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