It must have cleared all other celestial bodies, except its own moons, from its orbit.

We're showing that, everywhere we look now, there was some sort of magnetic field that was responsible for bringing mass to ...

Why does Jupiter look like it has a surface – even though it doesn’t have one? – Sejal, age 7, Bangalore, India ...

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They sometimes call it the Goldilocks zone — not too hot, not too cold. The habitable zone is the region of our Solar System ...

And what if nothing shows up at all? It would still be useful to know for sure how many planets there are, Rice said. “I think not even knowing the number of planets in our own solar system is ...

This hypothetical Neptune-sized planet would circle our Sun ... “It could completely reshape our understanding of the solar system and of other planetary systems, and how we fit into that ...

The smooth, planet-less disk of the Vega star system challenges planetary formation theories, suggesting alternative cosmic ...

It would depend on a lot, say our readers, from how big it was to the route it took - but it could have significant ...