Highlights of the eastern region of the outer galaxy include the beautiful Rosette nebula, the many objects embedded in the Gemini molecular clouds and the Gemini OB1 association, a runaway star knocked out of Orion's Trapezium cluster by an interstellar collision about 2.5 million years ago, and the mysterious Auriga OB2 association, whose Tadpole nebula and NGC 1893 central cluster appear to lie far away in the Outer arm of the Milky Way.
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- Basic plan of the Milky Way
- Surveying the Galaxy
- Mapping hydrogen
- Face-on map overview
- Introduction to the Milky Way Explorer
- The Cloud Hunters
- The Star Sweepers
- Things Unseen: The Westerhout radio sources
- The Avedisova catalog: A real Hitchhiker's Guide to the Galaxy?
- Avedisova glossary
- Strange new worlds
- Commentary on the Galactic Plane
- Hydrogen-alpha commentary