2 papers
astro-ph.EP2025
Extreme Geomagnetic Storm on Early Earth Induced by Corotating Interaction Regions from the Young Sun
Dibyendu Sur, Vladimir S. Airapetian
Recent multiwavelength observations of young solar analogs suggest that the young Sun in the first 600 Myr was a magnetically active star that produced an X-ray and Extreme-UV (EUV…
astro-ph.IM2025
Identifying rocky planets and water worlds among sub-Neptune-sized exoplanets with the Habitable Worlds Observatory
Renyu Hu, Michiel Min, Max Millar-Blanchaer +15
Astronomers are debating whether the plentiful "sub-Neptune" exoplanets -- worlds a bit larger than Earth but smaller than Neptune -- are predominantly rocky planets, water-rich "o…