When we think about orbits, we usually picture the Earth zooming around the sun. But does the sun just sit there? Or is it on its own journey? I asked my friend Guy Worthey. He’s a space scientist at ...

In the vast calm of the solar system, planetary orbits often appear orderly, stable, and insulated from the broader mechanics ...

Astronomers have uncovered what appear to be 21 neutron stars in orbit around stars like our Sun. The discovery is surprising because it is not clear how a star that exploded winds up next to a star ...

Scientists have weighed a rogue planet, the size of Saturn, floating alone in space. This planet has no sun and no orbit. Its ...