Astronomers using the Atacama Large Millimeter/submillimeter Array have discovered a cluster of monstrous young galaxies, called submillimeter galaxies, about 11.5 billion light-years away. Visualization of the proto-Great Wall and submillimeter galaxies. Image credit: National Astronomical Observatory of Japan. Submillimeter galaxies (SMGs) are massive gas-rich galaxies characterized as being enshrouded by dust and undergoing intense star-forming...
