British scientists have created a map of 4.4 million galaxies by scanning more than a quarter of the world’s northern skies. They are revealed in astonishing detail—providing spectacular images of our universe. Most are billions of light-years away. They harbor massive black holes and rapidly growing new stars. In rare cases, two separate groups are colliding into each other to form “supergalaxies.” Flaring suns can also be detected within the Milky Way. They would be deadly to extraterrestrials on nearby planets, unleashing streams of particles that play havoc with atmospheres. An international team used the alien-hunting virtual telescope named LOFAR (Low Frequency Array). It links radio antennae at the Chilbolton Observatory near Andover, Hampshire, with 5,000 others stationed across Europe. “This project is so exciting to work on,” said astronomer Dr. Timothy Shimwell, of Leiden University, in the Netherlands. “Each time we create a map, our screens are filled with new discoveries …