What’s the one thing that every telescope has to have? Sorry. That’s a trick question, there are actually a ton of things that every telescope has to have to work properly, but chief among them might be a set of lenses. Or at least that’s what researchers once thought.  According to engineers working at the University of Colorado, Boulder a new lensless model of telescope could be constructed using a large disk as a diffraction lens that would bend light from a target object an