![Low-ionization nuclear emission-line region / Seyfert galaxy / Galaxy / Hubble sequence / Cosmic distance ladder / Spiral galaxy / Megamaser / Pea galaxy / Astronomy / Extragalactic astronomy / Active galactic nucleus Low-ionization nuclear emission-line region / Seyfert galaxy / Galaxy / Hubble sequence / Cosmic distance ladder / Spiral galaxy / Megamaser / Pea galaxy / Astronomy / Extragalactic astronomy / Active galactic nucleus](https://www.pdfsearch.io/img/e8e7cbbed55a86f350862d3f641f2b12.jpg)
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City Pasadena / Cambridge / / Company Crane / Ford / BT / / Country United States / / Facility AND WALLACE L. W. SARGENT Palomar Observatory / Palomar Observatory / University of California / / IndustryTerm amorphous systems / surface brightness systems / early-type disk systems / quantitative applications / ionized gas / gas shows / disk systems / / Organization University of California / Berkeley / American Astronomical Society / Smithsonian Center for Astrophysics / Harvard / Department of Astronomy / / Person Balmer / / Position Hb / / Product Nikon D200 Digital Camera / / ProvinceOrState Kansas / California / Massachusetts / / PublishedMedium THE ASTROPHYSICAL JOURNAL / / Technology spectroscopy / radiation / /
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