Two giant 'super Earths' once orbited near Uranus and Neptune, then vanished, new study suggests

Our solar system may have hosted up to six giant planets in its first hundred million years, a new study suggests. The ...
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Scientists say our solar system may have lost two planets

We usually think of our Solar System as a calm, well-organized family of planets, but a new study suggests its early days may ...

The Moons of Uranus May Hold the Key to Finding Missing Planets

Jupiter, Saturn, Uranus and Neptune did not always have their current positions in the solar system. According to the ...
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A 'lost planet' may have given Jupiter and Uranus their moons

New research suggests the moons of Jupiter and Uranus may hint that our planetary neighborhood once had a third ice giant.
IFLScience

The Solar System May Have Ejected A Fifth Giant Planet – Which Would Explain How Uranus Held Onto Its Moons

Looking at the Solar System, Jupiter and Uranus both have plenty of irregular moons. In supercomputer simulations, the ...
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Beyond Our Solar System: How Uranus Prepares Us for Exoplanet Discovery

How can Uranus teach us about exoplanets? This is what a recent study presented at the 56th annual meeting of the American Astronomical Society (AAS) Division for Planetary Sciences (DPS) hopes to ...
SpaceNews

Solving solar system quandaries is simple: Just flip-flop the position of Uranus and Neptune

TEMPE, Ariz. a Quick: What’s the order of the planets in the solar system? Need a little help? Maybe the following mnemonic rings a bell: “My Very Educated Mother Just Served Up Nine Pizzas.” It’s ...
Futurism

Scientists Say Something May Have Visited the Solar System and Rearranged the Planets

The Sun is an incandescent but benevolent dictator. For billions of years, it’s kept our star system well organized through the influence of its powerful gravity. All the planets revolve around it on ...