James Webb Space Telescope reveals weather on brown dwarf SIMP 0136

An international team of researchers has used data from the James Webb Space Telescope (JWST) to decode the weather patterns of the brown dwarf SIMP 0136. Located approximately 20 light-years from Earth in the constellation Pisces, the object is larger and hotter than a gas giant but lacks the mass to become a star.

By employing Principal Component Analysis (PCA), a statistical technique used to simplify complex data, the team identified that the weather on SIMP 0136 is driven by temperature fluctuations and the vertical structure of its clouds. The JWST's Near-Infrared Spectrograph (NIRSpec) and Mid-Infrared Instrument (MIRI) captured minute brightness changes as the object rotates, revealing three recurring weather patterns. These patterns create hotter regions with thinner clouds and cooler regions with thicker, vertically extended cloud systems.

The findings, published in Astronomy & Astrophysics, demonstrate how high-sensitivity instrumentation and statistical modeling can distinguish significant atmospheric changes from random noise without requiring complex atmospheric modeling.