Does David Bowie's Blackstar sleeve hold a secret? Help us find out

Owners are claiming to have discovered a secret constellation – but is it an intentional chemical reaction or just a trick of the light?
Record collectors and David Bowie fans – we need you.
After spotting someone claiming that they left their Blackstar vinyl sleeve in sunlight for a few hours, unintentionally revealing a whole constellation of stars, we wondered whether you would help us test out their discovery (follow the link for instructions). Is it intentional design quirk aime