'Star Gazer Planetarium', 2000.
© Science Museum / Science & Society Picture Library
A handheld battery-powered projector that projects images of the major stars and constellations on to walls or ceilings. The instructions read: 'Select one of the four sky domes according to the season. Turn out the lights, switch on the Star Gazer and your living room becomes a glittering planetarium of named major stars and constellations. You can also use it outside.'