Space pebbles and rocks play pivotal role in giant planet’s formation
Peer-Reviewed Publication
In honor of Global Astronomy Month, we’re exploring the science of space. Learn how astronomy connects us through curiosity, discovery, and a shared wonder for what lies beyond.
Updates every hour. Last Updated: 27-Jul-2025 05:11 ET (27-Jul-2025 09:11 GMT/UTC)
An ultra-hot giant planet may have been formed by absorbing lightweight gases like methane evaporating from tiny space pebbles, whilst being bombarded with large rocky objects.
• Tracing the origin of an ultra-hot exoplanet: The chemical composition of WASP-121b suggests that it formed in a cool zone of its natal disc, comparable to the region of gas and ice giants in our Solar System.
• Methane indicates unexpected atmospheric dynamics: Despite extreme heat, methane was detected on the nightside – a finding that can be explained by strong vertical atmospheric circulation.• First detection of silicon monoxide in a planetary atmosphere: Measurements of this refractory gas allow quantifying the rocky material the planet had accumulated.
Crucial guidance to empower countries to develop or review their position on international law and cyber activities has been unveiled.