Every few years, something slips through our cosmic neighborhood that doesn't belong here. It arrives from somewhere out past ...

Hold a carbonaceous chondrite and you’re holding a piece of the solar system’s infancy — a fragment of rock that predates Earth, assembled from dust when the planets were still taking shape.

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Approximately 4.5 billion years ago, a cold cloud of gas and dust buried deep in one of the Milky Way galaxy’s spiral arms started to collapse. From there, gravity worked its magic. The cloud began to ...

Evidence pointing toward the existence of an undiscovered ninth planet in the solar system may actually indicate our ideas of gravity are incorrect. Such is the conclusion of two scientists who ...

Physicists have created a mini sun with its own simulated gravity to investigate the causes of extreme space weather. The tiny sun — consisting of a superheated plasma inside a 1-inch-wide ...

While life on Mars (and Venus) has long been an obsession for those wondering if we're alone, there are other places in our ...