Sharper images of the supermassive black hole at the center of the galaxy M87 were released Tuesday, according to a new study published in the Astrophysical Journal Letter.

The first images of the supermassive black hole debuted in April 2019 from the Event Horizon Telescope, showing a blurry but discernible image of the astronomical phenomenon. The new images revealed on Wednesday will improve tests of Einstein’s general theory of relativity, National Aeronautics and Space Administration wrote in a readout.