A groundbreaking study published in Communications Earth & Environment has called into question the long-standing assumptions ...

A small, inconspicuous meteorite may be about to change our understanding of how and when our solar system formed. Tiny shavings from the meteorite Northwest Africa 12264 are challenging the long-held ...

The inner planets are "probably rocky and may have thin atmospheres," NASA said, while the five outer planets are expected to have thick atmospheres. Artist's concept of Kepler-385, ...

Are planets in the solar system that are closer to the Sun older than the ones further away? ... The inner planets, including Earth, took at least 100 million years, maybe more.

Our best simulations so far capture only the general picture of the inner planets' formation, a roughly 100 million-year-long period in which small planetesimals collided to form the planets we ...

Astronomers have gotten a sneak peek at what could be Earth's ultimate fate in about 5 billion years when the sun reaches the end of its life and engulfs the solar system's inner planets ...

Astronomers have discovered six planets orbiting a bright star in perfect resonance. The star system, 100 light-years from Earth, was described on Wednesday in a paper published in the journal ...

But our inner planets seem to have formed with little of the element or lost it early in their history. But a look at exoplanets suggests that this isn't an inevitable fate.

Scientists have determined that Mercury, the closest planet to the sun, may contain a 10-mile thick mantle layer of diamonds based on data from NASA’s MESSENGER space probe, Space.com reported.