Nearly 4.5 million years ago, two large, hot stars brushed tantalizingly close to Earth's sun. They left behind a trace in ...

How can star populations help astronomers re-evaluate the search for intelligent extraterrestrial life, also called ...

For years, the center of our galaxy has been painted as a place where stars go to meet their end — a region ruled by Sagittarius A*, a black hole so massive that its gravity can stretch, tear, and ...