Astronomers discover rocky 170-million-year-old 'mega-Earth' that defies planet formation theories
aninews.in
A 170-million-year-old rocky "mega-Earth" is so dense and large that it shouldn't exist — and astronomers say it breaks the rules of how planets form.
Planetary Accretion TheoryCore Accretion ModelNebular HypothesisAnomaly-Driven Discovery
Theory Briefing
- A newly discovered exoplanet is described as unusually dense and giant, a combination current models say shouldn't be possible for a rocky world.
- At 170 million years old, the planet is young enough to challenge the timeline assumptions baked into standard planet formation theory.
- The find forces a rethink of how rocky planets accumulate mass — the leading models cap out well below this object's scale.
- Its existence opens the question of whether mega-Earths like this are rare flukes or a class of planets scientists simply haven't accounted for.