Joseph Wright of Derby’s shining innovation, Diane Arbus’s haunting portraits and an Uzbek angle on the end of the USSR – all in your weekly dispatch

Wright of Derby: From the Shadows
Two of the greatest paintings ever done about science – in which audiences are transfixed by lectures on an Orrery and Air-Pump – are brought together in this small but luminous show.

• National Gallery, London, until 10 May