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Gallium: A metal with a melting point of a little over 27 degrees centigrade. Meaning it melts from solid state to liquid state in your hand. Si dice faccia anche un rumore denominato "Il Canto del Gallio".
NASA ECHO II S-131 // From Wikipedia: "Project Echo was the first passive communications satellite experiment. Each of the two American spacecraft, launched in 1960 and 1964, was a metalized balloon satellite acting as a passive reflector of microwave signals. Communication signals were bounced off of them from one point on Earth to another."
This is not a hyper realist painting but a photograph of a star forming, courtesy of @HUBBLE_space