- ...2,
- Visiting astronomer, Cerro Tololo
Inter-American Observatory, National Optical Astronomy Observatories,
which are operated by the Association of Universities for Research in
Astronomy, under contract with the National Science Foundation.
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- ... of 8.5 kpc
- Note that in
old literature, this arm was sometimes called the "4-kpc expanding
arm'' due to a distance to the GC of 10.0 kpc.
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- ... accuracy
- Note that this argument
cannot be applied to G10.0-0.3, simply because it is not an H II region.
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