From a shrinking Mercury to Venus’s runaway greenhouse nightmare, the inner solar system is a story of extremes. This video ...

Earth and Mars were formed from material that largely originated in the inner Solar System; only a few percent of the building blocks of these two planets originated beyond Jupiter’s orbit. A group of ...

Scientists have seemingly settled long-standing arguments about whether the components of Earth originated from the inner or outer Solar System.

Earth's Composition Closely Matches Mars, Suggests New Study On Planet's Origins ...

Before the solar system had planets, the sun had rings — bands of dust and gas similar to Saturn’s rings — that likely played a role in Earth’s formation, according to a new study. “In the solar ...

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It’s not every day you get a chance to spot multiple planets with the naked eye—but this month, you can. Venus and Mercury are both visible in the sky, offering a rare glimpse ...