Astronomy & Space

The ghost in Orion’s shell: Hydrogen maps show repeated stellar feedback sculpted around Orion Nebula

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Researchers at the University of Vienna created the highest-resolution maps of neutral hydrogen in the Orion Nebula using advanced radio telescopes, revealing previously unseen structures in this star-forming region. The new data indicates that the nebula's current shape resulted from multiple episodes of stellar feedback over time, rather than from a single expanding bubble as previously thought. These findings provide new insights into how massive star formation regions interact with and modify their surrounding environments.


This research advances our understanding of stellar evolution and star formation processes, which are fundamental to understanding how galaxies develop and change over time. The improved mapping techniques and findings may help astronomers better predict and model star formation in other regions of our galaxy and beyond.


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An international team led by Juan Diego Soler at the University of Vienna used two of the world’s most powerful radio telescopes to uncover previously hidden structures within the Orion Nebula. The project produced the sharpest maps ever made of neutral hydrogen in that region of massive star formation. The findings expose the complex relationship of star-forming regions with their environment and suggest that the Orion Nebula has been shaped by multiple episodes of stellar feedback rather than a single expanding bubble. The study has been published in the journal Astronomy & Astrophysics.

Source: The ghost in Orion's shell: Hydrogen maps show repeated stellar feedback sculpted around Orion Nebula