Reflective clouds found wrapping a rocky lava planet
Observations using the James Webb Space Telescope reveal that the extreme rocky lava planet TOI-561 b is wrapped in a reflective atmosphere containing silicate mineral clouds made of quartz and sand compounds. Researchers analyzed the planet's phase curve over 37 hours and found that it reflects roughly three-quarters of incoming starlight while redistributing heat. Computer simulations suggest these silicate clouds act like sunscreen on the dayside, helping the molten world hold onto an atmosphere that might otherwise be stripped away by stellar radiation.
Researchers using China's Shenguang-II laser facility have recreated corona-like conditions in the laboratory to study how instabilities in plasma can drive extreme heating within the sun's outer atmosphere. By firing powerful lasers at wavy plastic targets, the team produced miniature plasma structures that triggered magnetic reconnection and tiny bursts of energy known as nanoflares. The experiment demonstrated that these plasma instabilities allowed electrons to reach temperatures of approximately 820,000 Kelvin, supporting theoretical models of how nanoflares contribute to coronal heating.
Simulations suggest stellar collisions were frequent in the early universe
A new cosmological study indicates that stars collided frequently within extremely dense clusters during the early universe. According to simulations, these repeated collisions could cause stars to merge into gigantic objects that eventually collapse into intermediate-mass black holes, potentially explaining the rapid appearance of supermassive black holes observed by the James Webb Space Telescope. The modeling links compact early galactic structures, such as little red dots, to environments where dense star clusters naturally foster black-hole seeds.
Written with AI from original reports. Source names and report dates are shown with each story.
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