Sometimes in order to support an idea, you first have to discredit alternative, competing ideas that could take resources away from the one you care about. In the scientific community, one of the most devastating ways you can do that is by making the other methods appear to be too expensive to be feasible, or, better yep, prove they wouldnt work at all due to some fundamental limitation. That is what a recent paper by Dr. Slava Turyshev, the worlds most prominent proponent of a Solar Gravitational Lens (SGL) telescope mission, does. He examines how effective alternative telescope technologies would be at creating a 10x10 pixel map of an exoplanet about 32 light years away. Unsurprisingly, theres only one that is able to do so without giant leaps and bounds in technology development - the SGL telescope.