A Philosopher Lecturing on the Orrery
A Philosopher Lecturing on the Orrery , or the full title , A Philosopher giving that Lecture on the Orrery in which a lamp is put in place of the Sun , is a 1766 painting by Joseph Wright of Derby depicting a lecturer giving a demonstration of an orrery – a mechanical model of the solar system – to a small audience . 
<triplet> A Philosopher Lecturing on the Orrery <subj> Joseph Wright of Derby <obj> creator <subj> orrery <obj> depicts