JWST Reveals Reflective Atmosphere on Ultra-Short-Period Lava World
Researchers using the James Webb Space Telescope examined the ultra-short-period exoplanet TOI-561 b and found evidence of a significant atmosphere containing reflective clouds of compounds like silicon dioxide. Orbiting its star in just 10.5 hours, the rocky super-Earth was previously expected to have lost any volatile envelope due to intense stellar radiation. Full-orbit phase curve observations indicate that roughly three-quarters of incoming stellar heat is reflected into space rather than accumulating on the nightside, challenging current theories of how heavily irradiated rocky exoplanets evolve and retain atmospheres over billions of years.
Radio Observations Reveal Stellar Companion Moving Through Betelgeuse Atmosphere
Radio observations gathered from 2021 to 2026 using the Very Large Array and ALMA show that Betelgeuse is accompanied by a smaller stellar companion named Siwarha, which orbits closely enough to plow directly through the red supergiant's extended atmosphere. Researchers found that the companion leaves a wake behind it and alters the supergiant's overall shape from egg-like to rounded depending on its orbital position. While the companion itself remains too faint to image directly at radio frequencies, its physical interaction with the star's outer layers offers new insights into how close companions influence mass loss in aging stars.
Initial TRACERS Data Sheds Light on Solar Wind and Magnetic Reconnection
NASA's twin TRACERS satellites analyzed initial data from their first year in orbit, providing new perspective on how solar wind interacts with Earth's magnetic shield through magnetic reconnection. By monitoring polar cusps where geomagnetic field lines converge, the mission's instruments indicate that magnetic reconnection operates primarily as a spatially shifting process rather than a temporally varying one. Understanding these dynamics helps researchers better trace how energy from solar storms is transferred into Earth's upper atmosphere, which can ultimately impact the safety of space assets and ground infrastructure.
New Search Model Inspired by Firefly Flashes Aims to Distinguish Alien Signals from Pulsars
Researchers developed a simplified toy model inspired by firefly mating communications to help search for technosignatures that might be masked by natural astronomical backgrounds. The model simulates repeating radio signals designed to be distinct from nearby pulsars while minimizing energy consumption. By testing candidate patterns against thousands of known pulsars, the conceptual study suggests that potentially artificial signals might be identifiable through their abstract repetition and pulse duration relationships relative to surrounding celestial radio sources, complementing existing search methodologies.
Written with AI from original reports. Source names and report dates are shown with each story.
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