Optical sky brightness at cerro tololo inter-american observatory from 1992 to 2006 von RISCIUNAS, Kevin K, SEMLER, Dylan R, RICHARDS, Joseph, SCHWARZ, Hugo E, SUNTZEFF, Nicholas B, VERA, Sergio, SANHUEZA, Pedro

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Proper Motion and Kinematics of the Ansae in NGC 7009 von Fernández, Rodrigo, Monteiro, Hektor, Schwarz, Hugo E

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Three-Dimensional Photoionization Structure and Distances of Planetary Nebulae. III. NGC 6781 von Schwarz, Hugo E, Monteiro, Hektor

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Orientation Effects in Bipolar Planetary Nebulae von Schwarz, Hugo E, Monteiro, Hektor, Peterson, Ryan

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Three-Dimensional Photoionization Structure and Distances of Planetary Nebulae. I. NGC 6369 von Monteiro, Hektor, Schwarz, Hugo E, Gruenwald, Ruth, Heathcote, Steve

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The Southern Crab from a New Perspective von Corradi, Romano L. M, Livio, Mario, Balick, Bruce, Munari, Ulisse, Schwarz, Hugo E

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Three-Dimensional Photoionization Structure and Distances of Planetary Nebulae. II. Menzel 1 von Monteiro, Hektor, Schwarz, Hugo E, Gruenwald, Ruth, Guenthner, Katherine, Heathcote, Steve R

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Light Pollution: The Global View: Proceedings of the International Conference on Light Pollution, La Serena, Chile, held 5–7 March 2002 von Schwarz, Hugo E

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High-Velocity Collimated Outflows in Planetary Nebulae: NGC 6337, He 2-186, and K4-47 von Corradi, Romano L. M, Gonçalves, Denise R, Villaver, Eva, Mampaso, Antonio, Perinotto, Mario, Schwarz, Hugo E, Zanin, Caterina

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The Large-Scale Ionized Outflow of CH Cygni von Corradi, Romano L. M, Munari, Ulisse, Livio, Mario, Mampaso, Antonio, Gonçalves, Denise R, Schwarz, Hugo E

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Kinematic and Morphological Modeling of the Bipolar Nebula Sa 2-237 von Schwarz, Hugo E, Corradi, Romano R. L, Montez, Jr., Rodolfo

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Rapid infrared and optical variability in the bright quasar 3C273 von Courvoisier, Thierry J.-L, Robson, E. Ian, Blecha, Andre, Bouchet, Patrice, Hughes, David H, Krisciunas, Kevin, Schwarz, Hugo E

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3D photoionization structure and distances of Planetary Nebulae III. NGC 6781 DOI: 10.5585/exacta.v4i2.756 von Schwarz, Hugo E., Monteiro, Hektor

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3D photoionization structure and distances of Planetary Nebulae III. NGC 6781 von Schwarz, Hugo E., Monteiro, Hektor

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Optical Sky Brightness at Cerro Tololo Inter‐American Observatory from 1992 to 20061 von Krisciunas, Kevin, Semler, Dylan R., Richards, Joseph, Schwarz, Hugo E., Suntzeff, Nicholas B., Vera, Sergio, Sanhueza, Pedro

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Bipolar nebulae and binary stars: the family of crabs He 2-104, BI Crucis, and MyCn 18 von CORRADI, R. L. M, SCHWARZ, H. E

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The 3-d view of planetary nebulae von Hugo E. Schwarz, Hektor Monteiro

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The kinematics of the high velocity bipolar nebulae NGC 6537 and Hb 5 von CORRADI, R. L. M, SCHWARZ, H. E

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Aircraft Contrail Pollution: Condensation Trails form Artificial Clouds von Pedersen, Holger, Schwarz, Hugo E.

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Research on the Impact of Lighting on Environment and Humans von Kirschbaum, Carlos

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