Credit: NASA, ESA, W. Keel, The University of Alabama, Galaxy Zoo team
This image of the active galaxy NGC 5972 was produced from data acquired by Keel's team using the NASA/ESA Hubble Space Telescope. It combines filtered exposures with the telescope's Advanced Camera for Surveys and Wide Field Camera 3. Red and green represent radiation from ionized hydrogen and oxygen atoms, respectively. This is one of the nearest galaxies included in the team's program on giant gas clouds illuminated by fading events around massive black holes, and it shows intricate details in the surrounding gas clouds.