Solar Physics
Butterfly-Shaped Coronal Hole Observed
A butterfly-shaped coronal hole appeared on the Sun, as reported in solar activity updates.
Scientists uncover cause of rapid solar rain during flares
Researchers at the University of Hawaiʻi Institute for Astronomy have solved the mystery of why solar rain forms so quickly during solar flares. Their work reveals that changing elemental abundances, like iron, enable the rapid cooling of plasma in the Sun's corona. This breakthrough could enhance predictions of space weather impacts on Earth.
Solar polar observatory mission planned for 2029 launch
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The Solar Polar-orbit Observatory (SPO) mission, set to launch in January 2029, will provide the first direct views of the Sun's polar regions. These areas, long hidden from Earth's orbital perspective, are key to understanding the solar magnetic cycle, fast solar wind, and space weather. The mission aims to address fundamental questions in solar physics through advanced imaging and in-situ measurements.
Scientists detect torsional Alfvén waves in sun's corona
Researchers have captured the first direct evidence of small-scale torsional Alfvén waves in the Sun's corona, potentially explaining its extreme heat. Using the Daniel K. Inouye Solar Telescope in Hawaii, the team observed these magnetic waves twisting through the solar atmosphere. The discovery, published on October 24 in Nature Astronomy, validates theories dating back to the 1940s.