unità flash USB(A small device used to store information. USB flash drives plug into computer USB ports so you can copy information to or from them, making it easy to share and transport information)
ultra-faint dwarf galaxy(Ultra-faint dwarf galaxies (UFDs) are a class of galaxies that contain from a few hundred to one hundred thousand stars, making them the faintest galaxies in the Universe. UFDs resemble globular clusters (GCs) in appearance but have very different properties. Unlike GCs, UFDs contain a significant amount of dark matter and are more extended. UFDs were first discovered with the advent of digital sky surveys in 2005, in particular with the Sloan Digital Sky Survey (SDSS). wikipedia.org'More)
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