Noctilucent clouds (NLCs), or night shining clouds, are tenuous cloud-like phenomena in the upper atmosphere.
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Messier 81 (also known as NGC 3031 or Bode's Galaxy) is a grand design spiral galaxy about 12 million light-years away in the constellation Ursa Major.
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Messier 81 (also known as NGC 3031 or Bode's Galaxy) is a grand design spiral galaxy about 12 million light-years away in the constellation Ursa Major.
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Messier 81, also known as Bode's Galaxy, is a classic grand-design spiral galaxy in Ursa Major lying about 12 million light-years away, with a disk spanning roughly 90,000 light-years.
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Messier 104, the Sombrero Galaxy, is a spiral galaxy of somewhat ambiguous classification straddling the Virgo/Corvus border, often described as intermediate between a spiral and a lenticular galaxy.
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Messier 101, the Pinwheel Galaxy, is a large, face-on “grand design” spiral galaxy in Ursa Major, cataloged as NGC 5457.
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The Milky Way or Milky Way Galaxy, or simply the Galaxy, is the galaxy that includes the Solar System, with the name describing the galaxy's appearance from Earth: a hazy band of light seen in the night sky formed by stars in other arms of the galaxy, which are so far away that they cannot be individually distinguished by the naked eye.
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The zodiacal light is a faint glow of diffuse sunlight scattered by interplanetary dust.
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The Milky Way or Milky Way Galaxy, or simply the Galaxy, is the galaxy that includes the Solar System, with the name describing the galaxy's appearance from Earth: a hazy band of light seen in the night sky formed by stars in other arms of the galaxy, which are so far away that they cannot be individually distinguished by the naked eye.
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The Galactic Center is the barycenter of the Milky Way and a corresponding point on the rotational axis of the galaxy.
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The Orion Nebula (M42, NGC 1976) is a diffuse emission nebula in the constellation Orion and the closest large region of massive star formation to Earth, at a distance of roughly 1,300-1,350 light-years.
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A total solar eclipse, dubbed the "Great American Eclipse" by some media, occurred on Monday, August 21, 2017.
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A total solar eclipse, dubbed the "Great American Eclipse" by some media, occurred on Monday, August 21, 2017.
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The Lagoon Nebula is a giant emission nebula with an H II region located in the constellation Sagittarius.
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The Milky Way or Milky Way Galaxy, or simply the Galaxy, is the galaxy that includes the Solar System, with the name describing the galaxy's appearance from Earth: a hazy band of light seen in the night sky formed by stars in other arms of the galaxy, which are so far away that they cannot be individually distinguished by the naked eye.
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M51 Whirlpool Galaxy as taken by the Burke-Gaffney Observatory Robot Planewave CDK24.
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The Milky Way at the Kejimkujik National Park and Historic Site Dark Sky Weekend 2016.
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