From the June 2007 issue

For serious observers only

Plan your observing using the catalog of American astronomer Stewart Sharpless.
By | Published: June 25, 2007 | Last updated on May 18, 2023
In the August issue of Astronomy, the story “Take the Sharpless Catalog challenge” introduces (or reintroduces) observers to the catalog of American astronomer Stewart Sharpless. He cataloged 313 HII regions north of declination –27°.

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