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  2. HNSKY - Wikipedia

    en.wikipedia.org/wiki/HNSKY

    HNSKY or Hallo Northern Sky is a free and open-source planetarium program for Linux, macOS, Microsoft Windows, and Raspberry Pi to simulate the night sky. It is provided with several non-English language modules, numerous astronomical catalogues, conversion utilities and tools, as well as several stellar databases.

  3. Orders of magnitude (illuminance) - Wikipedia

    en.wikipedia.org/wiki/Orders_of_magnitude...

    Starlight overcast moonless night sky [1] 140 microlux: Venus at brightest [1] 200 microlux: Starlight clear moonless night sky excluding airglow [1] 10 −3: 1 millilux: 2 millilux: Starlight clear moonless night sky including airglow [1] 10 −2: 1 centilux: 1 centilux: Quarter Moon 10 −1: 1 decilux: 2.5 decilux: Full Moon on a clear night ...

  4. SkyDoesMinecraft - Wikipedia

    en.wikipedia.org/wiki/SkyDoesMinecraft

    Adam Dahlberg (born January 17, 1993), known online as SkyDoesMinecraft, Sky Does Everything and NetNobody, is an American YouTuber mainly known for formerly producing family-friendly content related to Minecraft.

  5. NightSky - Wikipedia

    en.wikipedia.org/wiki/NightSky

    NightSky is an indie puzzle-platformer video game developed by Nifflas and published by Nicalis.It was released on March 1, 2011 for Windows, followed by a September 1, 2012 release for MacOS and Linux, an October 25, 2012 release for the Nintendo 3DS eShop, and a March 14, 2013 release on iOS.

  6. Sky quality meter - Wikipedia

    en.wikipedia.org/wiki/Sky_Quality_Meter

    A sky quality meter (SQM) is an instrument used to measure the luminance of the night sky. It is used, typically by amateur astronomers , to quantify the skyglow aspect of light pollution and uses units of " magnitudes per square arcsecond" favored by astronomers.

  7. Globe at Night - Wikipedia

    en.wikipedia.org/wiki/GLOBE_at_Night

    Globe at Night is an international scientific research program that crowdsources measurements of light pollution in the night sky. At set time periods within each year, the project asks people to count the number of stars that they can see from their location and report it to the project's website.

  8. Noctilucent cloud - Wikipedia

    en.wikipedia.org/wiki/Noctilucent_cloud

    Noctilucent clouds (NLCs), or night shining clouds, [1] are tenuous cloud-like phenomena in the upper atmosphere of Earth. When viewed from space, they are called polar mesospheric clouds (PMCs) , detectable as a diffuse scattering layer of water ice crystals near the summer polar mesopause .

  9. Night sky - Wikipedia

    en.wikipedia.org/wiki/Night_sky

    The night sky is the nighttime appearance of celestial objects like stars, planets, and the Moon, which are visible in a clear sky between sunset and sunrise, when the Sun is below the horizon. Natural light sources in a night sky include moonlight , starlight , and airglow , depending on location and timing.