A potential new dwarf planet has been discovered in the outer reaches of the solar system, and its existence poses the ...

Our solar system’s origin story spans billions of years and involves clouds of gas, cosmic collisions, and planetary ...

The object’s aphelion—the farthest point on the orbit from the sun—is more than 1,600 times that of Earth’s orbit,” Institute ...

A cloud of collapsing gas created our Sun, the first thing to form in our solar system. This happened about 4½ billion years ...

People always want to know what will happen to Earth when the sun eventually swells up as a red giant. For one thing, the ...

A new analysis of planet formation models estimates the odds of a theoretical Planet Nine orbiting our sun at 40% given ...

but also certain characteristics of Earth and the other inner rocky planets, which would have formed later than the outer planets from a depleted supply of planet-forming material. Laughlin and ...

The presence of water-ice in the debris disk around a young star could have helped facilitate the growth and development of ...

Inner planets are the four planets closest to the Sun: Mercury, Venus, Earth and Mars. They are collectively characterized by a solid surface and small size relative to the outer gas giants.

But the liquid outer core is shrinking ... be obliterated as our sun expands into a red giant and swallows the inner planets of the solar system, Vidale said. Until then, scientists should ...

If the core froze relatively recently, the current thermal state at the inner core–outer core boundary indicates ... cores and magma oceans of rocky planets which facilitate habitable conditions ...