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  2. Space art - Wikipedia

    en.wikipedia.org/wiki/Space_art

    Trouvelot, The great nebula in Orion (1875).. Astronomical art is a genre of space art that focuses on visual representations of outer space.It encompasses various themes, including the space environment as a new frontier for humanity, depictions of alien worlds, representations of extreme phenomena like black holes, and artistic concepts inspired by astronomy.

  3. Crab Nebula - Wikipedia

    en.wikipedia.org/wiki/Crab_Nebula

    The star emits pulses of radiation from gamma rays to radio waves. At X-ray and gamma ray energies above 30 keV, the Crab Nebula is generally the brightest persistent gamma-ray source in the sky, with measured flux extending to above 10 TeV. The nebula's radiation allows detailed study of celestial bodies that occult it.

  4. Messier 95 - Wikipedia

    en.wikipedia.org/wiki/Messier_95

    Messier 95, also known as M95 or NGC 3351, is a barred spiral galaxy about 33 million light-years away in the zodiac constellation Leo. It was discovered by Pierre Méchain in 1781, and catalogued by compatriot Charles Messier four days later. In 2012 its most recent supernova was discovered.

  5. Sun dog - Wikipedia

    en.wikipedia.org/wiki/Sun_dog

    Two sun dogs often flank the Sun within a 22° halo. The sun dog is a member of the family of halos caused by the refraction of sunlight by ice crystals in the atmosphere. Sun dogs typically appear as a pair of subtly colored patches of light, around 22° to the left and right of the Sun, and at the same altitude above the horizon as the Sun ...

  6. Halo (optical phenomenon) - Wikipedia

    en.wikipedia.org/wiki/Halo_(optical_phenomenon)

    A light pillar, or sun pillar, appears as a vertical pillar or column of light rising from the Sun near sunset or sunrise, though it can appear below the Sun, particularly if the observer is at a high elevation or altitude. Hexagonal plate- and column-shaped ice crystals cause the phenomenon.

  7. Astronomical symbols - Wikipedia

    en.wikipedia.org/wiki/Astronomical_symbols

    The use of astronomical symbols for the Sun and Moon dates to antiquity. The forms of the symbols that appear in the original papyrus texts of Greek horoscopes are a circle with one ray for the Sun and a crescent for the Moon. [3] The modern Sun symbol, a circle with a dot (☉), first appeared in Europe in the Renaissance. [3]

  8. Extinction (astronomy) - Wikipedia

    en.wikipedia.org/wiki/Extinction_(astronomy)

    An extreme example of visible light extinction, caused by a dark nebula. In astronomy, extinction is the absorption and scattering of electromagnetic radiation by dust and gas between an emitting astronomical object and the observer.

  9. Eagle Nebula - Wikipedia

    en.wikipedia.org/wiki/Eagle_Nebula

    The Eagle Nebula on WikiSky: DSS2, SDSS, GALEX, IRAS, Hydrogen α, X-Ray, Astrophoto, Sky Map, Articles and images; The Eagle's EGGs – ESO Photo Release; ESO: An Eagle of Cosmic Proportions incl. Photos & Animations; ESO: VST Captures Three-In-One incl. Photos & Animations; Messier 16, SEDS Messier pages; Spacetelescope.org, Hubble telescope ...