Protoplanetary Disks Gas Giants Rocky Planets Protoplanetary Discs Core Accretion Giant Planets Planetary Evolution Water Vapor Terrestrial Planets Brown Dwarfs Accretion Theory Disk Instability Circumplanetary Disks Theories Debris Disks Simulation Gas Disks Observations of Young Planets Chemical Composition Migration Formation Mechanisms Gas Giant Planets Disc Observation Migration Processes Protoplanet Shape Disk Evolution Cold Jupiter Core Formation Giant Stars Formation Theories Models Primordial Nebula Planetary Composition Disk Winds Stellar Formation Star Systems Disk Chemistry Sulfur Rogue Planets Cosmic Events Stellar Characteristics Supercomputer Simulations Protoplanetary Disk Star Formation Planet-Forming Disk Planetary Atmospheres Water Vapour Shape of Planets Accretion Processes Disc Fragmentation Disk Dispersal Mechanisms Planet-Forming Discs Migration Mechanisms Planet-Forming Disks Water Influence Disc Instability Asteroid Collision Observations Young Stars Solar System Star-Forming Regions Exoplanet Dynamics Inside-Out Systems Exoplanets Ejection Mechanisms Low-Density Planets Planetary Systems Planetesimals Planetary Migration Research Models Observational Astronomy Observational Evidence Research Tools Giant Impact Hypothesis Baby Planets Sulfur Influence Planet Composition Radial Velocity Measurements Earth-like Planets Stellar Evolution Cosmic Dust Metal Content Challenges in Explanation Dust Grains Shape of Young Planets Disc-Instability Theory
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A peer‑reviewed study reports record‑low densities measured from transit‑timing variations using unique Antarctic transit observations, prompting proposals for JWST atmospheric spectroscopy.
