Planetary Formation

Astronomers have discovered four exceptionally low-density planets orbiting a 20-million-year-old star named V1298 Tau, offering insights into the formation of common planetary systems. These worlds, with densities akin to polystyrene, are seen as precursors to super-Earths and sub-Neptunes. The findings, based on five years of observations, highlight a young version of systems prevalent across the galaxy.

2025년 10월 18일 AI에 의해 보고됨

Researchers at MIT have identified chemical remnants of Earth's earliest form, preserved deep within the planet's mantle. The discovery reveals a potassium isotope imbalance pointing to material from 4.5 billion years ago, surviving a cataclysmic collision. This finding challenges assumptions about Earth's formative history.