lunascope

Harry yelled at them, snatching up a lunascope and throwing it into the fireplace.

Harry Potter and the Order of the Phoenix Rowling, J. K. 2003

Harry spent the long sunny days exploring the shops and eating under the brightly colored umbrellas outside cafes, where his fellow diners were showing one another their purchases ( "it's a lunascope, old boy -- no more messing around with moon charts, see?") or else discussing the case of Sirius Black ( "personalty, I won't let any of the children out alone until he's back in Azkaban").

Harry Potter and the Prisoner of Azkaban Rowling, J. K. 1999