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  2. Sky-Map.org - Wikipedia

    en.wikipedia.org/wiki/SKY-MAP.ORG

    Sky-Map.org (or WikiSky.org) is a wiki and interactive sky map that covers over half a billion known celestial bodies. [1] WikiSky is designed, in part, as a wiki . Users can edit information about different stars by writing articles, adding Internet links, uploading images, or creating a special interest group for a specific task.

  3. Skalnate Pleso Atlas of the Heavens - Wikipedia

    en.wikipedia.org/wiki/Skalnate_Pleso_Atlas_of...

    The Atlas Coeli covers both hemispheres with 16 charts. The coordinate system is referred to equinox 1950.0 and the scale is 1° = 0.75 cm. There are six charts of the equatorial regions on a rectangular graticule, covering declinations from +25° to -25°; four charts for each hemisphere with straight, converging hour circles and concentric, equally-spaced declination circles covering ...

  4. Carte du Ciel - Wikipedia

    en.wikipedia.org/wiki/Carte_du_Ciel

    The Sydney 'Star Camera' used in the Carte du Ciel project, original publication, 1892. The Carte du Ciel (French pronunciation: [kaʁt dy sjɛl]; literally, 'Map of the Sky') and the Astrographic Catalogue (or Astrographic Chart) were two distinct but connected components of a massive international astronomical project, initiated in the late 19th century, to catalogue and map the positions of ...

  5. Laniakea Supercluster - Wikipedia

    en.wikipedia.org/wiki/Laniakea_Supercluster

    A video showing in 3D Laniakea and other nearby superclusters of galaxies The Laniakea Supercluster encompasses approximately 100,000 galaxies stretched out over 160 Mpc (520 million ly ). It has the approximate mass of 10 17 solar masses, or 100,000 times that of our galaxy, which is almost the same as that of the Horologium Supercluster . [ 3 ]

  6. Sloan Digital Sky Survey - Wikipedia

    en.wikipedia.org/wiki/Sloan_Digital_Sky_Survey

    The Sloan Digital Sky Survey or SDSS is a major multi-spectral imaging and spectroscopic redshift survey using a dedicated 2.5-m wide-angle optical telescope at Apache Point Observatory in New Mexico, United States.

  7. Bortle scale - Wikipedia

    en.wikipedia.org/wiki/Bortle_scale

    through a telescope, the brightest Messier objects are pale ghosts of their true selves; when it is full moon in a dark location the sky appears like this, but with the difference that the sky appears blue; limiting magnitude with 12.5" reflector is 14; 8 City sky 4.1–4.5 <18.00 the sky is light gray or orange – one can easily read

  8. Double Cluster - Wikipedia

    en.wikipedia.org/wiki/Double_Cluster

    The Double Cluster in Perseus (lower left of center, wide angle view) Greek astronomer Hipparchus cataloged the object (a patch of light in Perseus) as early as 130 BCE. To Bedouin Arabs the cluster marked the tail of the smaller of two fish they visualized in this area, and it was shown on illustrations in Abd al-Rahman al-Sufi's Book of Fixed Stars. [4]

  9. CfA 1.2 m Millimeter-Wave Telescope - Wikipedia

    en.wikipedia.org/wiki/CfA_1.2_m_Millimeter-Wave...

    The telescope is nicknamed "The Mini" because of its unusually small size. At the time it was built, it was the smallest radio telescope in the world. Together, "The Mini" and its twin in Chile have obtained what is by far the most extensive, uniform, and widely used galactic survey of interstellar carbon monoxide .