There’s a bit of a paradox about our galaxy: it’s both jam-packed with stars and cavernously empty. The Milky Way is crowded in the sense that it holds hundreds of billions of stars, as well as ...

The Sun, our nearest celestial neighbor, is undeniably a star, not a planet, as centuries of astronomical observations have ...

Stars passing close to the sun could cause planets to collide, including with Earth, or even be ejected as rogue planets, new simulations show. By Katherine Kornei If our species manages to hang on ...

"If our solar system is indeed moving this fast, we need to question fundamental assumptions about the large-scale structure ...

Look to the east after sunset on a clear winter night and you’ll spot a bright, tightly packed collection of stars. That’s ...