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BORTLE SCALE

  • Bortle scale
  • Scale for measuring the brightness of the night sky

    The Bortle dark-sky scale (usually referred to as simply the Bortle scale) is a nine-level numeric scale that measures the night sky's brightness of a

    Bortle scale

    Bortle scale

    Bortle_scale

  • John E. Bortle
  • American amateur astronomer

    John E. Bortle is an American amateur astronomer. He is best known for creating the Bortle scale to quantify the darkness of the night sky. Bortle has made

    John E. Bortle

    John_E._Bortle

  • Light pollution
  • Excess artificial light in an environment

    environmental impacts. The Bortle scale is a nine-level measuring system used to track how much light pollution there is in the sky. A Bortle scale of four or less

    Light pollution

    Light pollution

    Light_pollution

  • Apparent magnitude
  • Brightness of a celestial object observed from the Earth

    January 2019. Retrieved 8 November 2018. John E. Bortle (February 2001). "The Bortle Dark-Sky Scale". Sky & Telescope. Archived from the original on 23

    Apparent magnitude

    Apparent magnitude

    Apparent_magnitude

  • Darkness
  • Lack of light

    when adapting to darkness. One scientific measure of darkness is the Bortle scale, which indicates the night sky's and stars' brightness at a particular

    Darkness

    Darkness

    Darkness

  • Marconi Beach
  • Beach in Massachusetts, United States

    beyond the breakers during the summer and fall. At nighttime, the park is Bortle Scale Class 3, making it a popular stargazing site for those in Eastern Massachusetts

    Marconi Beach

    Marconi Beach

    Marconi_Beach

  • B1
  • Topics referred to by the same term

    Australia B-Line bus route Chopin's Ballade No. 1 The darkest sky on the Bortle scale Unitree B1, a robot dog made by Unitree Robotics Search for "B1" on Wikipedia

    B1

    B1

  • Gliese 105
  • Triple star system in the constellation Cetus

    the brightest component is barely visible with the unaided eye (see Bortle scale). No planets have yet been detected around any of the stars in this system

    Gliese 105

    Gliese 105

    Gliese_105

  • Wairarapa Dark Sky Reserve
  • Dark sky reserve in New Zealand

    than 21.3 mag/arcsec2 (corresponding to Bortle scale 3), and in places are as dark as 21.8 mag/arcsec2 (Bortle scale 1). Large parts of the Wairarapa region

    Wairarapa Dark Sky Reserve

    Wairarapa Dark Sky Reserve

    Wairarapa_Dark_Sky_Reserve

  • Indian Astronomical Observatory
  • Astronomy station in Hanle, India

    darkness of the night sky is classified on the Bortle scale as an "excellent" dark astronomical site with Bortle colour key "Black". Dark sky is important

    Indian Astronomical Observatory

    Indian Astronomical Observatory

    Indian_Astronomical_Observatory

  • AK Leporis
  • Star in the constellation Lepus

    It has an apparent visual magnitude of 6.141, so, according to the Bortle scale, it is faintly visible from rural skies at night. This star forms a wide

    AK Leporis

    AK Leporis

    AK_Leporis

  • St Martin's, Isles of Scilly
  • Island off Cornwall, England

    Higher Town. The night sky on the island is rated as class 1 on the Bortle scale, which means it has very minimal light pollution and is possibly the

    St Martin's, Isles of Scilly

    St Martin's, Isles of Scilly

    St_Martin's,_Isles_of_Scilly

  • Scientific phenomena named after people
  • Borrmann–Campbell effect) – Gerhard Borrman (and Herbert N. Campbell) Bortle scale – John E. Bortle Bose–Einstein condensate, effect, statistics – Satyendra Nath

    Scientific phenomena named after people

    Scientific_phenomena_named_after_people

  • List of nearest exoplanets
  • star system in April 2021 was EQ Pegasi (20.4 ly). According to the Bortle scale, an astronomical object is visible to the naked eye under "typical" dark-sky

    List of nearest exoplanets

    List of nearest exoplanets

    List_of_nearest_exoplanets

  • DarkSky International
  • Environmental organization focused on light pollution

    reduce light trespass, and do not pollute the night sky. Astrotourism Bortle scale Commission for Dark Skies CieloBuio, an Italian coordination for the

    DarkSky International

    DarkSky_International

  • Tāhuna Glenorchy Dark Sky Sanctuary
  • Dark sky preserve in New Zealand

    luminance in the sanctuary area is 21.61 mag/arcsec2 (corresponding to Bortle scale 2, and representing a truly dark sky). There are no visible light domes

    Tāhuna Glenorchy Dark Sky Sanctuary

    Tāhuna Glenorchy Dark Sky Sanctuary

    Tāhuna_Glenorchy_Dark_Sky_Sanctuary

  • Amateur astronomy
  • Hobby of watching the sky and stars

    for the American Association of Variable Star Observers. Created the Bortle scale to quantify the darkness of the night sky. Robert Burnham Jr. (1931–1993)

    Amateur astronomy

    Amateur astronomy

    Amateur_astronomy

  • Kawarau Gibbston Dark Sky Park
  • Dark sky preserve in New Zealand

    the park is 21.75 mag/arcsec2 (corresponding to Bortle scale 2 and on the threshold of Bortle scale 1). The Gibbston Community Association is a registered

    Kawarau Gibbston Dark Sky Park

    Kawarau Gibbston Dark Sky Park

    Kawarau_Gibbston_Dark_Sky_Park

  • Angeli, Finland
  • Village in Lapland, Finland

    Angeli is called the "darkest village in Finland"; measured on the Bortle scale, Angeli's degree of darkness is one, which is why the darkness is so

    Angeli, Finland

    Angeli, Finland

    Angeli,_Finland

  • Kaikōura Dark Sky Sanctuary
  • Dark sky preserve in New Zealand

    The average night sky luminance is 21.58 mag/arcsec2 (corresponding to Bortle scale 3). A key driver for the establishment of a dark-sky preserve in the

    Kaikōura Dark Sky Sanctuary

    Kaikōura Dark Sky Sanctuary

    Kaikōura_Dark_Sky_Sanctuary

  • Hell Creek Recreation Area
  • Park in Montana, USA

    lease arrangement with the U.S. Army Corps of Engineers. The park has Bortle scale class 1 skies (low light pollution). "Hell Creek State Park". Geographic

    Hell Creek Recreation Area

    Hell Creek Recreation Area

    Hell_Creek_Recreation_Area

  • HN Pegasi
  • Star in the constellation Pegasus

    It has an apparent visual magnitude of 5.9, which, according to the Bortle scale, indicates that it is visible to the naked eye from suburban skies. Parallax

    HN Pegasi

    HN Pegasi

    HN_Pegasi

  • Eta Carinae
  • Stellar system in the constellation Carina

    Eta Carinae". NASA. Retrieved 2 August 2018. Bortle, John E. (2001). "Introducing the Bortle Dark-Sky Scale". Sky and Telescope. 101 (2): 126. Bibcode:2001S&T

    Eta Carinae

    Eta Carinae

    Eta_Carinae

  • Astrotourism in India
  • coffee plantations and natural forests, and rates 3 (rural sky) on the Bortle scale. The conservation of dark skies could help conservation of ecology and

    Astrotourism in India

    Astrotourism_in_India

  • Limiting magnitude
  • Faintest item observable by an instrument

    dark rural areas located 200 km (120 mi) from major cities. (See the Bortle scale.) There is even variation within metropolitan areas. For those who live

    Limiting magnitude

    Limiting magnitude

    Limiting_magnitude

  • Aoraki / Mount Cook National Park
  • National park in New Zealand

    night sky brightness in the reserve ranks at a level 2 on the nine-level Bortle scale. In 2018 the Department of Conservation drafted a management plan for

    Aoraki / Mount Cook National Park

    Aoraki / Mount Cook National Park

    Aoraki_/_Mount_Cook_National_Park

  • HD 193664
  • Star in the constellation Draco

    Catalogue designation. With an apparent magnitude of 5.93, according to the Bortle Scale it is visible to the naked eye from suburban skies. Parallax measurements

    HD 193664

    HD 193664

    HD_193664

  • Sigma Piscium
  • Star in the constellation Pisces

    50, meaning it is barely visible to the naked eye, according to the Bortle scale. While parallax measurements by the Hipparcos spacecraft give a distance

    Sigma Piscium

    Sigma Piscium

    Sigma_Piscium

  • Mount John University Observatory
  • Astronomical research observatory in New Zealand

    only four such reserves around the world at that time. The area has a Bortle Scale of 2. There are 5 large telescopes on the mountain that are in regular

    Mount John University Observatory

    Mount John University Observatory

    Mount_John_University_Observatory

  • Dark-sky preserve
  • Area that restricts artificial light pollution

    Country Name Location Area (in ha) Bortle Scale Status Notes Australia The Jump-Up, Australian Age of Dinosaurs Queensland 1,400 1–2 Dark Sky Sanctuary

    Dark-sky preserve

    Dark-sky preserve

    Dark-sky_preserve

  • Oxford Forest Conservation Area
  • Protected area in New Zealand

    45 mag/arcsec2 (corresponding to Bortle scale 3), and in places are as dark as 21.76 and 21.80 mag/arcsec2 (Bortle scale 1). The application for designation

    Oxford Forest Conservation Area

    Oxford Forest Conservation Area

    Oxford_Forest_Conservation_Area

  • Naseby, New Zealand
  • Town in the South Island of New Zealand

    between 21.10 and 21.77 mag/arcsec2 (the higher value corresponds to Bortle scale 1, representing an excellent dark sky site). Astrotourism ventures have

    Naseby, New Zealand

    Naseby, New Zealand

    Naseby,_New_Zealand

  • Sigma2 Ursae Majoris
  • Binary star in the constellation Ursa Major

    magnitude of about 4.8, meaning it can be seen with the naked eye (see Bortle scale). This is a visual binary, meaning that the two components can be resolved

    Sigma2 Ursae Majoris

    Sigma2_Ursae_Majoris

  • Wai-iti Dark Sky Park
  • Protected area in New Zealand

    52 mag/arcsec2 (corresponding to Bortle scale 3), with a few individual readings of 21.84 mag/arcsec2 (Bortle scale 1). In July 2023, the Top of the South

    Wai-iti Dark Sky Park

    Wai-iti_Dark_Sky_Park

  • Astrophotography
  • Imaging of astronomical objects

    D810A Charge-coupled device Cold camera photography Light pollution Bortle scale List of Hubble anniversary images LRGB (Luminance, Red, Green, and Blue)

    Astrophotography

    Astrophotography

    Astrophotography

  • Everglades National Park
  • National park in Florida, United States

    Sky Quality Meter (SQM) reading decreasing from 21.54 to 21.31 and the Bortle Scale shifting from 4.1 to 4.3, indicating relatively effective protection

    Everglades National Park

    Everglades National Park

    Everglades_National_Park

  • 39 Tauri
  • Star in the constellation Taurus

    Taurus. It has an apparent visual magnitude of 5.90, so, according to the Bortle scale, it is faintly visible from suburban skies at night. Measurements made

    39 Tauri

    39 Tauri

    39_Tauri

  • 1 Ceti
  • Star in the constellation Cetus

    magnitude of about 6.2, the star is barely visible to the naked eye (see Bortle scale). Parallax estimates put it at a distance of about 530 light-years (162

    1 Ceti

    1_Ceti

  • 21 Leonis Minoris
  • Star in the constellation Leo Minor

    magnitude of about 4.5, the star is faintly visible to the naked eye (see Bortle scale). Parallax estimates made by the Hipparcos spacecraft put it at a fairly

    21 Leonis Minoris

    21 Leonis Minoris

    21_Leonis_Minoris

  • HD 194244
  • Star in the constellation Aquila

    constellation of Aquila. With an apparent magnitude of 6.14, according to the Bortle scale it is faintly visible to the naked eye from rural skies on a dark night

    HD 194244

    HD_194244

  • Beta Phoenicis
  • Binary star in the constellation Phoenix

    magnitude is 3.30, meaning that it can be seen with the naked eye (see Bortle scale). This is a relatively wide visual binary consisting of two G-type red

    Beta Phoenicis

    Beta Phoenicis

    Beta_Phoenicis

  • HD 196761
  • G-type main sequence star in the constellation Capricornus

    the limit of what can be seen with the naked eye, but according to the Bortle Scale it may be possible to view it at night from rural skies. Based upon parallax

    HD 196761

    HD_196761

  • HD 14412
  • Star in the constellation Fornax

    star has an apparent visual magnitude of 6.33, which, according to the Bortle scale, can be dimly seen with the naked eye from rural locations. Based upon

    HD 14412

    HD 14412

    HD_14412

  • 36 Tauri
  • Star in the constellation Taurus

    meaning it can barely be seen with the naked eye, according to the Bortle scale. 36 Tauri is a spectroscopic binary. The two stars are close enough that

    36 Tauri

    36_Tauri

  • 41 Tauri
  • Star in the constellation Taurus

    visible to the naked eye from brighter suburban skies (according to the Bortle scale). Parallax measurements put it at a distance of roughly 404 light years

    41 Tauri

    41 Tauri

    41_Tauri

  • 110 Herculis
  • Star in the constellation Hercules

    19, and it can be faintly seen with the naked eye, according to the Bortle scale. Based on parallax estimates made by the Hipparcos spacecraft, the star

    110 Herculis

    110 Herculis

    110_Herculis

  • HD 211392
  • Suspected variable star in the constellation Aquarius

    light-years away. With an apparent magnitude close to six, according to the Bortle scale it is just visible to the naked eye from dark, rural skies. It is a giant

    HD 211392

    HD_211392

  • 10 Canum Venaticorum
  • Star in the constellation Canes Venatici

    It has an apparent visual magnitude of 5.95, which, according to the Bortle scale, can be faintly seen with the naked eye from suburban locations. Based

    10 Canum Venaticorum

    10 Canum Venaticorum

    10_Canum_Venaticorum

  • Zeta Circini
  • Star in the constellation Circinus

    is barely visible to the naked eye on a dark night. (According to the Bortle scale, it requires the lighting level of suburban skies or darker to be seen

    Zeta Circini

    Zeta_Circini

  • 25 Scorpii
  • Star in the constellation Scorpius

    eyesight and can only be seen under excellent conditions, according to the Bortle scale. The object is moving closer to the Earth with a heliocentric radial

    25 Scorpii

    25_Scorpii

  • HD 147513
  • Star in the constellation Scorpius

    catalogue as "XVI 55". With an apparent magnitude of 5.38, according to the Bortle scale it is visible to the naked eye from suburban skies. Based upon stellar

    HD 147513

    HD 147513

    HD_147513

  • HD 192310
  • Star in the constellation Capricornus

    to be viewed from the Earth with the unaided eye. (According to the Bortle scale, it can be viewed from dark suburban skies.) HD 192310 is suspected of

    HD 192310

    HD 192310

    HD_192310

  • Painted Rocks State Park
  • State park in Montana, United States

    and black rock walls of the granite and rhyolite cliffs. The park has Bortle scale class 1 skies which makes the state park a great place for astronomy

    Painted Rocks State Park

    Painted_Rocks_State_Park

  • Beta Sextantis
  • Star in the constellation Sextans

    is faintly visible to the naked eye on a dark night. According to the Bortle scale, it can be viewed from brighter lit suburban skies. The distance to this

    Beta Sextantis

    Beta Sextantis

    Beta_Sextantis

  • HD 210434
  • Star in the constellation Aquarius

    giant star in the equatorial constellation of Aquarius. According to the Bortle scale, an apparent magnitude of six means this star is faintly visible to the

    HD 210434

    HD_210434

  • HD 47366
  • Star in the constellation Canis Major

    the lower limit of stars visible to the naked eye. According to the Bortle scale, it can be viewed from dark rural skies. Parallax measurements performed

    HD 47366

    HD_47366

  • The End of Night (book)
  • Non-fiction book by Paul Bogard

    Spanish. The nine chapters of Bogard's book map to the nine levels of the Bortle scale, which attempts to quantify the subjective brightness and suitability

    The End of Night (book)

    The_End_of_Night_(book)

  • Nu1 Columbae
  • Star in the constellation Columba

    naked eye, having an apparent visual magnitude of 6.14. According to the Bortle scale, stars with this magnitude are faintly visible from dark rural skies

    Nu1 Columbae

    Nu1_Columbae

  • HD 202259
  • Star in the constellation Aquarius

    constellation of Aquarius. With an apparent magnitude of 6.39, according to the Bortle scale it is faintly visible to the naked eye from dark rural skies. It has

    HD 202259

    HD_202259

  • HD 96700
  • Star in the constellation Hydra

    be seen with the naked eye by a typical observer. (According to the Bortle scale, it is possible for some observers to see it from dark rural skies.)

    HD 96700

    HD_96700

  • Nu Caeli
  • Star in the constellation Caelum

    limit of brightness that is visible to the naked eye. According to the Bortle scale, the star can be viewed from dark suburban skies. Based upon an annual

    Nu Caeli

    Nu Caeli

    Nu_Caeli

  • Delta Ceti
  • Star in the constellation Cetus

    the naked eye except in places highly affected to light pollution (see Bortle scale). It is 0.3238° north of the celestial equator compared to the celestial

    Delta Ceti

    Delta Ceti

    Delta_Ceti

  • 32 Tauri
  • Yellow-white hued subgiant star in the constellation Taurus

    making it visible to the naked eye from suburban skies (according to the Bortle scale). The position of this star near the ecliptic plane means that it is

    32 Tauri

    32 Tauri

    32_Tauri

  • Psi Crateris
  • Star in the constellation Crater

    naked eye with an apparent visual magnitude of 6.13. According to the Bortle scale, it requires dark suburban or rural skies to view. Based upon an annual

    Psi Crateris

    Psi_Crateris

  • Halibut Point State Park
  • State park in Massachusetts, United States

    the quarry relates the story of the point's granite mining past. At Bortle Scale Class 4, the park is a popular stargazing site for those in Eastern Massachusetts

    Halibut Point State Park

    Halibut Point State Park

    Halibut_Point_State_Park

  • 68 Draconis
  • Star in the constellation Draco

    Draco. It has an apparent visual magnitude of 5.69, so, according to the Bortle scale, it is faintly visible to the naked eye from suburban skies at night

    68 Draconis

    68_Draconis

  • Delta Sextantis
  • Solitary star in the constellation Sextans

    eye, having an apparent visual magnitude of +5.25. According to the Bortle scale, that means it can be viewed from dark suburban skies. This is a B-type

    Delta Sextantis

    Delta Sextantis

    Delta_Sextantis

  • HD 126053
  • Star in the constellation Virgo

    which means it is faintly visible to the naked eye. According to the Bortle scale, it requires dark suburban or rural skies to view. Parallax measurements

    HD 126053

    HD 126053

    HD_126053

  • Libra (constellation)
  • Zodiac constellation in the southern celestial hemisphere

    on 28 January 2023. Retrieved 3 April 2016. Bortle, John E. (February 2001). "The Bortle Dark-Sky Scale". Sky & Telescope. Sky Publishing Corporation

    Libra (constellation)

    Libra (constellation)

    Libra_(constellation)

  • HR 6594
  • Binary star system in the constellation of Hercules

    naked eye with an apparent visual magnitude of 5.54; according to the Bortle scale, it is sufficiently bright to be visible from dark suburban skies. The

    HR 6594

    HR_6594

  • 6 Tauri
  • Star in the constellation Taurus

    Taurus. It has an apparent visual magnitude of 5.8, so, according to the Bortle scale, it is faintly visible from suburban skies at night. Measurements made

    6 Tauri

    6_Tauri

  • Black Mesa State Park
  • State park in Oklahoma, United States

    Retrieved January 6, 2013. R, Mike (August 22, 2021). "State Park Bortle 1 Scale Information In The US". CosmosPNW. Retrieved January 16, 2022. "Lake

    Black Mesa State Park

    Black Mesa State Park

    Black_Mesa_State_Park

  • Upsilon Virginis
  • Star in the constellation Virgo

    of 5.25, making it faintly visible to the naked eye. According to the Bortle scale, it is visible from backlit suburban skies at night. Based upon a measured

    Upsilon Virginis

    Upsilon Virginis

    Upsilon_Virginis

  • HD 35984
  • Star in the constellation Auriga

    Auriga. It has an apparent magnitude of 6.20, which, according to the Bortle scale, indicates it is faintly visible to the naked eye from dark rural skies

    HD 35984

    HD_35984

  • International Dark Sky Week
  • Annual international event in April

    Astronomy Week Noctcaelador White House Astronomy Night Light pollution Bortle scale "Home". "What Is National Dark Sky Week?". Wise Geek. Conjecture Corporation

    International Dark Sky Week

    International Dark Sky Week

    International_Dark_Sky_Week

  • 61 Cancri
  • Star in the constellation Cancer

    means 61 Cancri is faintly visible to the naked eye. (According to the Bortle scale, it can be seen from rural or even dark suburban skies.) Based upon parallax

    61 Cancri

    61_Cancri

  • V352 Aurigae
  • Star in the constellation Auriga

    visual magnitude that ranges from 6.13 down to 6.18. According to the Bortle scale, it is faintly visible to the naked eye from dark rural skies. The star

    V352 Aurigae

    V352 Aurigae

    V352_Aurigae

  • Jizera Dark-Sky Park
  • First transnational Dark-sky preserve

    Tanvald, and Jelenia Góra. The sky quality of that park expressed by the Bortle scale is at level 4, and reaches level 3 under exceptionally good conditions

    Jizera Dark-Sky Park

    Jizera Dark-Sky Park

    Jizera_Dark-Sky_Park

  • Kappa1 Sagittarii
  • Binary star in the constellation Sagittarius

    bright enough to be faintly visible to the naked eye. According to the Bortle scale, it can be viewed from dark suburban skies. Based upon an annual parallax

    Kappa1 Sagittarii

    Kappa1 Sagittarii

    Kappa1_Sagittarii

  • 13 Trianguli
  • Star in the constellation Triangulum

    Triangulum. It has an apparent visual magnitude of 5.89, so according to the Bortle scale it is faintly visible from dark suburban skies. The star is located at

    13 Trianguli

    13 Trianguli

    13_Trianguli

  • HD 54475
  • B-type main-sequence star in the constellation Puppis

    with an amplitude of less than a tenth of a magnitude. According to the Bortle scale "MAST: Barbara A. Mikulski Archive for Space Telescopes". Space Telescope

    HD 54475

    HD 54475

    HD_54475

  • 63 Ceti
  • Star in the constellation of Cetus

    of about 5.933±0.010 the star is barely visible to the naked eye (see Bortle scale) as a dim, orange-hued point of light. Parallax estimates put it at a

    63 Ceti

    63_Ceti

  • Omega Geminorum
  • Star in the constellation Gemini

    magnitude of 5.18, it is faintly visible to the naked eye. According to the Bortle scale, it can be viewed from dark suburban skies. With an annual parallax shift

    Omega Geminorum

    Omega Geminorum

    Omega_Geminorum

  • 9 Ceti
  • Star in the constellation Cetus

    be seen with the naked eye by a typical observer. (According to the Bortle scale, it is possible for some observers to see it from dark rural skies.)

    9 Ceti

    9 Ceti

    9_Ceti

  • 47 Tauri
  • Star in the constellation Taurus

    meaning it can be faintly seen with the naked eye, according to the Bortle scale. 47 Tauri is a visual binary, meaning that the two components can be

    47 Tauri

    47 Tauri

    47_Tauri

  • HR 3384
  • Star in the constellation Pyxis

    38, indicating it is faintly visible to the naked eye. Based on the Bortle scale, the star can be viewed from dark rural skies. Astrometric measurements

    HR 3384

    HR 3384

    HR_3384

  • HD 205765
  • Star in the constellation Aquarius

    sequence star with an apparent magnitude of 6.2, which, according to the Bortle scale, makes it faintly visible to the naked eye from dark rural skies. This

    HD 205765

    HD_205765

  • Nu Horologii
  • Star in the constellation Horologium

    seen with the naked eye from the southern hemisphere. (According to the Bortle scale, it can be seen at night from bright suburban skies.) Based upon parallax

    Nu Horologii

    Nu Horologii

    Nu_Horologii

  • Lambda Mensae
  • Star in the constellation Mensa

    or near the limit on stars visible to the naked eye. According to the Bortle scale, it requires a dark night from rural skies for this star to be viewed

    Lambda Mensae

    Lambda_Mensae

  • 82 Virginis
  • Star in the constellation Virgo

    magnitude is 5.01, making it visible to the naked eye. According to the Bortle scale Vallenari, A.; et al. (Gaia collaboration) (2023). "Gaia Data Release

    82 Virginis

    82_Virginis

  • Alabama Hills
  • Hills and rock formations in California, U.S.

    pollution map". www.lightpollutionmap.info. Retrieved 2018-07-13. "bortle dark sky scale". www.handprint.com. Retrieved 2018-07-13. Sources Geology Underfoot

    Alabama Hills

    Alabama Hills

    Alabama_Hills

  • HD 219623
  • Star in the constellation Cassiopeia

    brightness range that is visible to the naked eye. According to the Bortle scale, it can be observed from dark suburban skies. Parallax measurements place

    HD 219623

    HD 219623

    HD_219623

  • Kappa Crateris
  • Star in the constellation Crater

    It has an apparent visual magnitude of 5.94, which, according to the Bortle scale, can be seen with the naked eye under dark suburban skies. The distance

    Kappa Crateris

    Kappa Crateris

    Kappa_Crateris

  • Iota Crateris
  • Star in the constellation Crater

    naked eye with an apparent visual magnitude of 5.48. According to the Bortle scale, this means it can be viewed from suburban skies at night. Based upon

    Iota Crateris

    Iota Crateris

    Iota_Crateris

  • 39 Leonis
  • Star in the constellation Leo

    Leo. It has an apparent visual magnitude of 5.90, so, according to the Bortle scale, it is faintly visible from suburban skies at night. Parallax measurements

    39 Leonis

    39_Leonis

  • 7 Tauri
  • Multiple star system in the constellation Taurus

    has a combined apparent visual magnitude of 5.95, so, according to the Bortle scale, it is faintly visible from suburban skies at night. Measurements made

    7 Tauri

    7_Tauri

  • 99 Herculis
  • Star in the constellation Hercules

    system has an apparent visual magnitude of 5.1, which, according to the Bortle scale, makes it faintly visible to the naked eye from suburban skies. Measurements

    99 Herculis

    99 Herculis

    99_Herculis

  • 17 Cygni
  • Star in the constellation Cygnus

    Cygnus. It has an apparent visual magnitude of 5.00, so, according to the Bortle scale, it is visible from suburban skies at night. Measurements of the annual

    17 Cygni

    17 Cygni

    17_Cygni

  • Copper Breaks State Park
  • State park in Texas, United States

    stargazing program once a month from April through October. The park's Bortle Scale rating is a Class 2, which indicates there's a very low amount of light

    Copper Breaks State Park

    Copper Breaks State Park

    Copper_Breaks_State_Park

  • 19 Aquarii
  • White-hued hydrogen-burning star in the constellation Aquarius

    the star is barely visible to the naked eye as a white-hued star (see Bortle scale). Parallax estimates put it at a distance of about 260 light years away

    19 Aquarii

    19_Aquarii

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BORTLE SCALE

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BORTLE SCALE

  • Birtle
  • Boy/Male

    English

    Birtle

    From the bird hill.

    Birtle

  • BARTLET
  • Male

    English

    BARTLET

    Diminutive form of English Bartholomew, BARTLET means "son of Talmai."

    BARTLET

  • Myrtle
  • Girl/Female

    Christian & English(British/American/Australian)

    Myrtle

    The Myrtle

    Myrtle

  • Hartle
  • Surname or Lastname

    German (also Härtle)

    Hartle

    German (also Härtle) : from a pet form of the various Germanic compound names formed with hard ‘hardy’, ‘brave’, ‘strong’ as the first element.English : variant of Hartell.

    Hartle

  • Bartley
  • Surname or Lastname

    English

    Bartley

    English : habitational name from Bartley in Hampshire, or from Bartley Green in the West Midlands, both of which are named with Old English be(o)rc ‘birch’ + lēah ‘woodland clearing’; compare Barclay.Americanized spelling of German (Swabian) Bartle and the Swiss cognate Bartli.The surname Bartley was brought to VA from Northumberland in 1724.

    Bartley

  • Bore
  • Boy/Male

    Australian, Finnish, Swedish

    Bore

    Fight; Battle

    Bore

  • BARTLEY
  • Male

    English

    BARTLEY

    Old English name BARTLEY means "Bart's (Bartholomew's) meadow."

    BARTLEY

  • BERTHE
  • Female

    French

    BERTHE

    French form of German Bertha, BERTHE means "bright."

    BERTHE

  • Myrtle
  • Girl/Female

    Greek American English

    Myrtle

    Myrtle.

    Myrtle

  • Bartle
  • Surname or Lastname

    English

    Bartle

    English : from a pet form of the medieval personal name Bartholomew.German (Swabian : Bärtle): from a pet form of Bartolomäus (see Bartholomew) or Berthold. It is also found as an altered spelling of Bartel.

    Bartle

  • Bartle
  • Boy/Male

    Hebrew English

    Bartle

    Ploughman. Son of Talmai (Talmai is a, meaning abounding in furrows.) Famous bearer: St...

    Bartle

  • DORTHE
  • Female

    Scandinavian

    DORTHE

    Variant spelling of Scandinavian Dorte, DORTHE means "gift of God."

    DORTHE

  • Birtle
  • Boy/Male

    American, British, English

    Birtle

    From the Bird Hill; Hill of Birds

    Birtle

  • BIRTHE
  • Female

    Scandinavian

    BIRTHE

    Pet form of Scandinavian Birgitta, BIRTHE means "exalted one."

    BIRTHE

  • Mirtle
  • Girl/Female

    British, English

    Mirtle

    Botanical Name; The Myrtle is a Dark Green Shrub with Pink or White Blossoms

    Mirtle

  • BARTLE
  • Male

    Irish

    BARTLE

    Pet form of Irish Gaelic Bairtliméad, BARTLE means "son of Talmai."

    BARTLE

  • MYRTLE
  • Female

    English

    MYRTLE

    English name derived from the vocabulary word, myrtle, the name of a flowering shrub or tree, derived from the Old French diminutive myrtille, MYRTLE means "little myrtle."

    MYRTLE

  • BERTIE
  • Female

    English

    BERTIE

    English pet form of German Bertha, BERTIE means "bright." Compare with masculine Bertie.

    BERTIE

  • Battle
  • Surname or Lastname

    English and Scottish (of Norman origin)

    Battle

    English and Scottish (of Norman origin) : habitational name from a place named as having been the site of a battle, from Old French bataille ‘battle’. In some cases, this may be Battle in Sussex, site of the Battle of Hastings,A John Battle from Yorkshire, England, settled in 1654 on the Nansemond, a stream in VA. His descendants became prominent in NC and GA.

    Battle

  • BERTIE
  • Male

    English

    BERTIE

    Pet form of English Bert, BERTIE means "bright." Compare with feminine Bertie.

    BERTIE

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BORTLE SCALE

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BORTLE SCALE

Online names & meanings

  • Senthil
  • Boy/Male

    Hindu

    Senthil

    Red and formidable one

  • Sandi
  • Boy/Male

    Australian, Danish, Japanese, Swedish

    Sandi

    Man's Defender; Shining Upon Man

  • Filkins
  • Surname or Lastname

    English

    Filkins

    English : patronymic from the medieval personal name Filkin, a diminutive from a short form of Philip.English : habitational name from a place so called in Oxfordshire, whose name is probably a tribal derivative (with Old English -ingas ‘people of’) of the Old English personal name Filica (of uncertain origin). Surname forms such as de Filking(es) are found in the surrounding area from the 12th and 13th centuries.

  • KOLMOGOROV
  • Male

    Russian

    KOLMOGOROV

    (Колмогоров) Russian name KOLMOGOROV means "hill."

  • Aakaanksha
  • Girl/Female

    Indian

    Aakaanksha

    Wish, Desire

  • Anja |
  • Girl/Female

    Muslim

    Anja |

    Favor, Grace (1)

  • HYMAN
  • Male

    Yiddish

    HYMAN

     Yiddish altered form of Hebrew Hyam, HYMAN means "life." Compare with another form of Hyman.

  • Praudha
  • Girl/Female

    Hindu, Indian

    Praudha

    Old

  • Meenu
  • Girl/Female

    Assamese, Gujarati, Hindu, Indian, Kannada, Punjabi, Rajasthani, Sanskrit, Sikh, Sindhi, Tamil, Traditional

    Meenu

    Girl with Fish Eyes

  • Sarabdayal
  • Boy/Male

    Indian, Punjabi, Sikh

    Sarabdayal

    Mercy for All

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BORTLE SCALE

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BORTLE SCALE

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Other words and meanings similar to

BORTLE SCALE

AI search in online dictionary sources & meanings containing BORTLE SCALE

BORTLE SCALE

  • Hurtle
  • v. t.

    To push; to jostle; to hurl.

  • Turtle
  • n.

    Any one of the numerous species of Testudinata, especially a sea turtle, or chelonian.

  • Borel
  • n.

    See Borrel.

  • Bottler
  • n.

    One who bottles wine, beer, soda water, etc.

  • Bottle
  • v. t.

    To put into bottles; to inclose in, or as in, a bottle or bottles; to keep or restrain as in a bottle; as, to bottle wine or porter; to bottle up one's wrath.

  • Bottled
  • a.

    Put into bottles; inclosed in bottles; pent up in, or as in, a bottle.

  • Beetle
  • v. t.

    To finish by subjecting to a hammering process in a beetle or beetling machine; as, to beetle cotton goods.

  • Battle
  • v. t.

    To assail in battle; to fight.

  • Bottle
  • n.

    Fig.: Intoxicating liquor; as, to drown one's reason in the bottle.

  • Battle
  • n.

    To join in battle; to contend in fight; as, to battle over theories.

  • Woulfe bottle
  • n.

    A kind of wash bottle with two or three necks; -- so called after the inventor, Peter Woulfe, an English chemist.

  • Battle-ax
  • n.

    Alt. of Battle-axe

  • Bottled
  • imp. & p. p.

    of Bottle

  • Bottled
  • a.

    Having the shape of a bottle; protuberant.

  • Battle
  • v. t.

    A struggle; a contest; as, the battle of life.

  • Bottle-nosed
  • a.

    Having the nose bottle-shaped, or large at the end.

  • Hurtle
  • v. t.

    To meet with violence or shock; to clash; to jostle.

  • Turtle-shell
  • n.

    The turtle cowrie.

  • Bottle
  • n.

    The contents of a bottle; as much as a bottle contains; as, to drink a bottle of wine.