Researchers were surprised to find giant gas planets orbiting quite near to their stars. Yet novelists had already imagined ...

The small world was found during a search for the hypothetical Planet Nine, and astronomers say the next time it will reach ...

As it orbits the sun once every 25,000 years, the celestial body 2017 OF201 travels beyond the Kuiper Belt into a region ...

A team of astronomers believe they may have discovered a new dwarf planet—just like Pluto—on the edge of our solar system.

It's an evocative idea that has long bedeviled scientists: a huge and mysterious planet is lurking in the darkness at the ...

In the cold, dark outskirts of planetary systems far beyond the reach of the known planets, mysterious gas giants and ...

As the rocky planets begin to settle into their orbits, Proto-Earth and Thea uncover the Sun’s true purpose for the Solar System: life. But while the planets argue, explore, and evolve, a hidden plan ...

Astronomers find evidence of a possible ninth planet beyond Neptune, reigniting the debate about the formation of the Solar ...

We often imagine that our planet might be a sentient entity - Gaia - but could something like this evolve under known science? And might a conscious world be something we might create in the future?

dwarf planets and moons in our solar system do have seasonal cycles — and they can look wildly different from the ones we experience on Earth, experts told Live Science. You may like Which ...

In astrology, a planet is said to be in retrograde motion when it appears to be moving backwards in the sky. This is an optical illusion and does not mean that the planet is actually moving backwards.

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