Josiah: Accountant supermarket manager http://weimar.edu/written-papers/ home work help There's a big challenge to testing this hypothesis: the region between Earth and the galactic center contains a lot of dust, which blocks visible light. Infrared and radio waves both pierce that dust, but their long wavelengths require correspondingly large telescopes to achieve high resolution. That places fundamental limits on how closely the light emissions can be pinpointed relative to the black hole. After all, astronomers are trying to study a region smaller than the Solar System at a distance of 26,000 light years.