Overview of the Orion Complex
John Bally

TL;DR
The paper reviews the structure, star formation history, and feedback effects within the Orion Complex, highlighting its role as a nearby, well-studied star-forming region influencing its surrounding interstellar environment.
Contribution
It provides a comprehensive overview of the Orion Complex's structure, star formation processes, and feedback mechanisms, integrating recent observational data and contextualizing it within the Solar vicinity.
Findings
Orion has formed over ten thousand stars in multiple sub-groups.
Supernovae in Orion created a large super-bubble affecting surrounding clouds.
Feedback from stars influences ongoing star formation in the region.
Abstract
The Orion star formation complex is the nearest region of on-going star formation that continues to produce both low and high mass stars. Orion is discussed in the larger context of star formation in the Solar vicinity over the last 100 Myr. The Orion complex is located on the far side of the Gould's Belt system of clouds and young stars throughwhich our Solar systemis drifting. A review is given of the overall structure and properties of the Orion star forming complex, the best studied OB association. Over the last 12 Myr, Orion has given birth to at least ten thousand stars contained in a half dozen sub-groups and short-lived clusters. The Orion OB association has been the source of several massive, high-velocity run-away stars, including mu-Columbae and AE Aurigae. Some of Orion's most massive members died in supernova explosions that created the 300 pc diameter Orion / Eridanus…
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Taxonomy
TopicsAstro and Planetary Science · Atomic and Molecular Physics · Advanced Frequency and Time Standards
