Earth, between sweltering Venus and frozen Mars, formed and orbits within a band where water could persist in solid, liquid, and gaseous phases. Mars had surface water, but not as much as Earth, and ...

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

The movements of the planets in the Solar System are pretty difficult to get your head around, even before we get started on the dark matter which seems to keep galaxies together and rotating with ...

It’s commonly known that the Sun is the center of our solar system, with all the planets orbiting around it. However, this ...

After a decade-long search, some scientists say a growing number of clues point to the existence of a hidden planet in the Kuiper Belt beyond Neptune — and they may soon have the opportunity to find ...

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 ...

Solar and cosmochemical data indicate high levels of carbon, nitrogen, and oxygen in the Sun. Researchers have unveiled a new ...

"Solar system formation models ... what element abundances in giant planet atmospheres can tell us about the formation of planets. We already have our eyes on Uranus -- NASA's next target ...

This frigid planet, our solar system’s third largest, remains a bit of an enigma 243 years later. And some of what we thought we knew about it turns out to be off the mark. Much of the knowledge ...