The solar system lost its ninth planet back when Pluto was demoted to a dwarf planet, but research might indicate that there ...

Forbes contributors publish independent expert analyses and insights. An award-winning reporter writing about stargazing and the night sky. An object has been discovered orbiting the sun far beyond ...

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Iron meteorites show the first bodies of the early solar system were 83% to 92% dry rock, with water arriving millions of ...

Ancient iron meteorites reveal that some of the Solar System’s first solid bodies were built mostly from tiny heat-forged rock beads called chondrules, while water-rich dust was largely excluded. The ...

The number of rocky extrasolar planets being discovered continues to increase, but so too does the apparent diversity of such worlds.

When the solar system began building its first solid objects, it had two main ingredients available. One was chondrules—tiny, ...