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- Bortle_scale abstract "The Bortle scale is a nine-level numeric scale that measures the night sky's brightness of a particular location. It quantifies the astronomical observability of celestial objects and the interference caused by light pollution. John E. Bortle created the scale and published it in the February 2001 edition of Sky & Telescope magazine to help amateur astronomers evaluate the darkness of an observing site, and secondarily, to compare the darkness of observing sites. The scale ranges from Class 1, the darkest skies available on Earth, through Class 9, inner-city skies. It gives several criteria for each level beyond naked-eye limiting magnitude (NELM). The accuracy and utility of the scale have been questioned in recent research.The table below summarizes Bortle's descriptions of the classes.".
- Bortle_scale thumbnail Suburban_night_sky.jpg?width=300.
- Bortle_scale wikiPageExternalLink bortle-scale.
- Bortle_scale wikiPageExternalLink www.darksky.org.
- Bortle_scale wikiPageExternalLink www.observingsites.com.
- Bortle_scale wikiPageExternalLink 3304011.html?c=y&page=1.
- Bortle_scale wikiPageID "10101941".
- Bortle_scale wikiPageLength "6879".
- Bortle_scale wikiPageOutDegree "51".
- Bortle_scale wikiPageRevisionID "705562382".
- Bortle_scale wikiPageWikiLink Airglow.
- Bortle_scale wikiPageWikiLink Amateur_astronomy.
- Bortle_scale wikiPageWikiLink Andromeda_Galaxy.
- Bortle_scale wikiPageWikiLink Astronomical_object.
- Bortle_scale wikiPageWikiLink Astronomy.
- Bortle_scale wikiPageWikiLink Averted_vision.
- Bortle_scale wikiPageWikiLink Beehive_Cluster.
- Bortle_scale wikiPageWikiLink Category:Amateur_astronomy.
- Bortle_scale wikiPageWikiLink Category:Light_pollution.
- Bortle_scale wikiPageWikiLink Category:Scales.
- Bortle_scale wikiPageWikiLink Constellation.
- Bortle_scale wikiPageWikiLink Dark-sky_movement.
- Bortle_scale wikiPageWikiLink File:Suburban_night_sky.jpg.
- Bortle_scale wikiPageWikiLink Gegenschein.
- Bortle_scale wikiPageWikiLink Globular_cluster.
- Bortle_scale wikiPageWikiLink International_Dark-Sky_Association.
- Bortle_scale wikiPageWikiLink John_E._Bortle.
- Bortle_scale wikiPageWikiLink Light_pollution.
- Bortle_scale wikiPageWikiLink Limiting_magnitude.
- Bortle_scale wikiPageWikiLink List_of_minor_planets:_4001–5000.
- Bortle_scale wikiPageWikiLink Messier_15.
- Bortle_scale wikiPageWikiLink Messier_22.
- Bortle_scale wikiPageWikiLink Messier_4.
- Bortle_scale wikiPageWikiLink Messier_5.
- Bortle_scale wikiPageWikiLink Messier_object.
- Bortle_scale wikiPageWikiLink Milky_Way.
- Bortle_scale wikiPageWikiLink Moon.
- Bortle_scale wikiPageWikiLink Naked_eye.
- Bortle_scale wikiPageWikiLink Night_sky.
- Bortle_scale wikiPageWikiLink Planet.
- Bortle_scale wikiPageWikiLink Pleiades.
- Bortle_scale wikiPageWikiLink Reflecting_telescope.
- Bortle_scale wikiPageWikiLink Sagittarius_(constellation).
- Bortle_scale wikiPageWikiLink Scorpius.
- Bortle_scale wikiPageWikiLink Sky_&_Telescope.
- Bortle_scale wikiPageWikiLink Sky_brightness.
- Bortle_scale wikiPageWikiLink Star_cluster.
- Bortle_scale wikiPageWikiLink Telescope.
- Bortle_scale wikiPageWikiLink Triangulum_Galaxy.
- Bortle_scale wikiPageWikiLink Zenith.
- Bortle_scale wikiPageWikiLink Zodiacal_light.
- Bortle_scale wikiPageWikiLinkText "Bortle scale".
- Bortle_scale wikiPageWikiLinkText "faintly visible".
- Bortle_scale wikiPageWikiLinkText "near the limit".
- Bortle_scale wikiPageWikiLinkText "visible from suburban skies".
- Bortle_scale wikiPageUsesTemplate Template:Commons.
- Bortle_scale wikiPageUsesTemplate Template:Official_website.
- Bortle_scale wikiPageUsesTemplate Template:Redirect.
- Bortle_scale wikiPageUsesTemplate Template:Reflist.
- Bortle_scale subject Category:Amateur_astronomy.
- Bortle_scale subject Category:Light_pollution.
- Bortle_scale subject Category:Scales.
- Bortle_scale hypernym Scale.
- Bortle_scale type Aircraft.
- Bortle_scale type Redirect.
- Bortle_scale comment "The Bortle scale is a nine-level numeric scale that measures the night sky's brightness of a particular location. It quantifies the astronomical observability of celestial objects and the interference caused by light pollution. John E. Bortle created the scale and published it in the February 2001 edition of Sky & Telescope magazine to help amateur astronomers evaluate the darkness of an observing site, and secondarily, to compare the darkness of observing sites.".
- Bortle_scale label "Bortle scale".
- Bortle_scale sameAs Q2722595.
- Bortle_scale sameAs Bortleova_stupnice.
- Bortle_scale sameAs Bortle-Skala.
- Bortle_scale sameAs Escala_de_cielo_oscuro_de_Bortle.
- Bortle_scale sameAs Bortlen_asteikko.
- Bortle_scale sameAs Échelle_de_Bortle.
- Bortle_scale sameAs Bortleova_skala.
- Bortle_scale sameAs Bortle-skála.
- Bortle_scale sameAs Scala_del_cielo_buio_di_Bortle.
- Bortle_scale sameAs ボートル・スケール.
- Bortle_scale sameAs Skala_Bortle’a.
- Bortle_scale sameAs Escala_de_Bortle.
- Bortle_scale sameAs m.02q1vs6.
- Bortle_scale sameAs Q2722595.
- Bortle_scale sameAs 波特尔暗空分类法.
- Bortle_scale wasDerivedFrom Bortle_scale?oldid=705562382.
- Bortle_scale depiction Suburban_night_sky.jpg.
- Bortle_scale homepage 3304011.html?c=y&page=1.
- Bortle_scale isPrimaryTopicOf Bortle_scale.