Tolle Spielerei von National Geographic, ein Atlas für die Monde der Planeten des Solarsystems: „Our solar system collectively hosts nearly 200 known moons, some of which are vibrant worlds in their own right. Take a tour of the major moons in our celestial menagerie, including those that are among the most mystifying—or scientifically intriguing—places in our local neighborhood.“
And in another Galaxy, far far away, Scientists Are Trying to Make ‘Ploonets’ a Thing. Ploonets sind Ex-Monde, die aus der Umlaufbahn eines Planeten geschleudert werden und eigene Mini-Planeten formen. Und die Moonmoons solcher Ploonets wären dann Ploonmoons (Ploonies? Ploonlets?)
This paper explores the scenario where large regular exomoons escape after tidal-interchange of angular momentum with its parent planet, becoming small planets by themselves. We name this hypothetical type of object a ploonet. By performing semi-analytical simulations of tidal interactions between a large moon with a close-in giant, and integrating numerically their orbits for several Myr, we found that in ∼50 per cent of the cases a young ploonet may survive ejection from the planetary system, or collision with its parent planet and host star, being in principle detectable.
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