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  2. David Cole Observatory - Wikipedia

    en.wikipedia.org/wiki/David_Cole_Observatory

    Celestar 8 inch: Schmidt–Cassegrain: Celestar 11 inch: Schmidt–Cassegrain: Celestron 11" CPC telescope: Schmidt–Cassegrain: CGE 14 14 inch German Equatorial Mount: Schmidt–Cassegrain: Meade LX200 10 inch: Schmidt–Cassegrain: Orion SkyQuest XT12 IntelliScope: 12 inch Dobsonian: Coronado Solar Telescope: 60 mm

  3. Stephan's Quintet - Wikipedia

    en.wikipedia.org/wiki/Stephan's_Quintet

    Stephan's Quintet is a visual grouping of five galaxies of which four form the first compact galaxy group ever discovered. [2] The group, visible in the constellation Pegasus, was discovered by Édouard Stephan in 1877 at the Marseille Observatory. [3] The group is the most studied of all the compact galaxy groups. [2]

  4. List of Solar System objects by size - Wikipedia

    en.wikipedia.org/wiki/List_of_Solar_System...

    For example, if a TNO is incorrectly assumed to have a mass of 3.59 × 10 20 kg based on a radius of 350 km with a density of 2 g/cm 3 but is later discovered to have a radius of only 175 km with a density of 0.5 g/cm 3, its true mass would be only 1.12 × 10 19 kg.

  5. Lists of astronomical objects - Wikipedia

    en.wikipedia.org/wiki/Lists_of_astronomical_objects

    Comet Lovejoy and Jupiter, a giant gas planet; The Sun; Sirius A with Sirius B, a white dwarf; the Crab Nebula, a remnant supernova; A black hole (artist concept); Vela Pulsar, a rotating neutron star; M80, a globular cluster, and the Pleiades, an open star cluster; The Whirlpool galaxy and Abell 2744, a galaxy cluster; Superclusters, galactic ...

  6. Astrophotography - Wikipedia

    en.wikipedia.org/wiki/Astrophotography

    It was conducted by 20 observatories all using special photographic telescopes with a uniform design called normal astrographs, all with an aperture of around 13 in (330 mm) and a focal length of 11 ft (3.4 m), designed to create images with a uniform scale on the photographic plate of approximately 60 arcsecs/mm while covering a 2° × 2 ...

  7. List of directly imaged exoplanets - Wikipedia

    en.wikipedia.org/wiki/List_of_directly_imaged_e...

    Motion interpolation of seven images of the HR 8799 system taken from the W. M. Keck Observatory over seven years, featuring four exoplanets. This is a list of extrasolar planets that have been directly observed, sorted by observed separations. This method works best for young planets that emit infrared light and are far from the glare of the star.

  8. John Dobson (amateur astronomer) - Wikipedia

    en.wikipedia.org/wiki/John_Dobson_(amateur...

    The 24-inch (610 mm) Dobsonian telescope brought by the Sidewalk Astronomers was unconventional, because most telescopes at such meetings tended to be smaller, on equatorial mounts, and designed for astrophotography rather than optical viewing. Surprisingly (and controversially at the time) Dobson's telescope tied in first prize for best optics.

  9. Family Portrait (Voyager) - Wikipedia

    en.wikipedia.org/wiki/Family_Portrait_(Voyager)

    The Family Portrait, or sometimes Portrait of the Planets, is an image of the Solar System acquired by Voyager 1 on February 14, 1990, from a distance of approximately 6 billion km (40 AU; 3.7 billion mi) from Earth. It features individual frames of six planets and a partial background indicating their relative positions.

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