Study Suggests Two Giant Planets Once Orbited Near Uranus and Neptune Before Vanishing
A new study analyzing over 100 simulations of the early solar system suggests two giant 'super Earths' once orbited in the outer solar system near Uranus and Neptune. These hypothetical planets would have gravitationally influenced the orbits of existing planets and their moons before being ejected into interstellar space. The research addresses unexplained orbital characteristics of the current solar system that don't align with standard formation models.
Researchers conducted more than 100 simulations of the early solar system's formation and evolution to explain orbital inconsistencies among the eight known planets and their hundreds of moons. The study proposes that two additional giant planets, classified as 'super Earths,' existed in the outer solar system near the current positions of Uranus and Neptune. These hypothetical planets would have gravitationally interacted with existing planets and moons, reshaping their orbits through gravitational encounters. Eventually, according to the simulations, these two planets were ejected from the solar system entirely, being cast into interstellar space. This model helps explain orbital characteristics that remain difficult to account for using standard planetary formation theories.
What's missing
The article does not specify which specific orbital anomalies or moon characteristics prompted this hypothesis, nor does it explain the timeline of when these planets would have been ejected or what observational evidence (if any) supports the model beyond orbital inconsistencies.
How coverage differed
Live Science presents this as a speculative scientific hypothesis based on computational modeling, using cautious language ('may have once been,' 'hints') appropriate for preliminary research. The framing emphasizes the puzzle-solving aspect of planetary science rather than presenting the finding as definitive.
What different sources said
- Live ScienceCenter
2 giant 'super Earths' once orbited near Uranus and Neptune, messed up a bunch of moons, then vanished, new study hints
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