So which planets in our solar system have rings? All four giant planets — Jupiter, Saturn, Uranus and Neptune — sport these ...

Our solar system may have a ninth planet after all, following the declassification of Pluto nearly two decades ago, ...

If the object really is Planet Nine, it would be larger than Neptune and exist 700 times further from the sun than Earth.

Astronomers have detected a promising sign of a ninth planet lurking at the the farthest reaches of the Solar System.

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Most astronomers agree that life is likely common throughout the universe. While Earth is the only world known to have life, ...

Over the past decade or so, astronomers have speculated about the characteristics of rogue planets in the Milky Way galaxy.

A new look through decades-old data has unveiled some of the most compelling evidence yet of a hidden ninth planet in the far ...

What is the hottest planet in the solar system? If you want to know which is the hottest star in the solar system, this ...

They believe that Vesta was on its way to becoming a planet and that the Solar System's rocky planets likely began as ...