Humanity has learned to fling machines to the edge of the solar system, but the stars remain stubbornly out of reach. The same physics that lets us orbit Earth and land probes on distant worlds also ...

The workings of our solar system are roughly the same now as they have been for millions of years. Moons circle their planets, the planets circle the sun, the sun’s magnetic fields and sunspots wax ...

The mysterious interstellar object traveling through our solar system has been spotted acting like no other comet ever seen before, revealing its alien origins. Scientists from Michigan State ...

Add Yahoo as a preferred source to see more of our stories on Google. The Oort Cloud, an expanse of icy bodies in the far reaches of our solar system, is shown here in a scene from "Encounters in the ...