NASA astronaut comes home after circling Earth 3,920 times

Three ISS astronauts returned aboard a Soyuz spacecraft on December 8 in Kazakhstan. Credit: NASA / Bill Ingalls Get the Popular Science daily newsletter💡 Breakthroughs, discoveries, and DIY tips sent every weekday. After 245 days in orbit aboard the International Space Station (ISS), one NASA astronaut and two cosmonauts have safely returned to Earth. NASA’sContinue Reading

How do you activate a supermassive black hole? A galaxy merger should do the trick

A compilation of images of distant galaxies, some merging, some not, taken by Euclid. (Image credit: Euclid Collaboration) Scientists have confirmed that colossal collisions between galaxies trigger titanic eruptions in the centers of those galaxies, and the discovery is thanks to an artificial intelligence tool that was able to sort through images of a millionContinue Reading