Astronomers have long puzzled over how some massive galaxies stop forming stars and remain dormant for billions of years—even ...

What makes red geysers stand out is that they show faint, galaxy-scale outflows of ionized gas, stretching tens of thousands ...

Saturn's icy moon Enceladus has long been considered a potential home for life in our solar system. In 2005, NASA's Cassini spacecraft first discovered towering plumes of water vapor erupting from the ...