Astronomers have discovered a rare in-sync solar system with six planets moving like a grand cosmic orchestra, untouched by outside forces since their birth billions of years ago. The find ...

An accidental discovery in an astronomy show offers researchers a new clue about the mysterious Oort Cloud, a large expanse ...

There may be another world lurking between the orbital lines of our solar system. Astronomers in Japan have published their theory of an “Earth-like planet,” dubbed Planet Nine, that’s ...

It's common knowledge that the sun is the center of the solar system. Around it, the planets orbit — along with a thick belt of asteroids, some meteor fields, and a handful of far-traveling comets.

Is this all we’ll ever accomplish beyond the Solar System, a scattering of wayward probes sent out into the infinite night? For decades, scientists, engineers, and dreamers have worked to ...

Our Sun had a companion and there could be many undiscovered dwarf planets in the outer Solar System. That’s according to a new paper from scientists from Harvard University. Published today in ...