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  2. Barnstar - Wikipedia

    en.wikipedia.org/wiki/Barnstar

    Barnstar. A barnstar (or barn star, primitive star, or Pennsylvania star) is a painted object or image, often in the shape of a five-pointed star but occasionally in a circular "wagon wheel" style, used to decorate a barn in some parts of the United States. They have no structural purpose but may be considered lucky, akin to a horseshoe mounted ...

  3. Sculptor Dwarf Galaxy - Wikipedia

    en.wikipedia.org/wiki/Sculptor_Dwarf_Galaxy

    The Sculptor Dwarf Galaxy (also known as Sculptor Dwarf Elliptical Galaxy or the Sculptor Dwarf Spheroidal Galaxy, and formerly as the Sculptor System) is a dwarf spheroidal galaxy that is a satellite of the Milky Way. The galaxy lies within the constellation Sculptor. It was discovered in 1937 by American astronomer Harlow Shapley using the 24 ...

  4. Protoplanetary disk - Wikipedia

    en.wikipedia.org/wiki/Protoplanetary_disk

    Protoplanetary disks are thought to be thin structures, with a typical vertical height much smaller than the radius, and a typical mass much smaller than the central young star. [12] The mass of a typical proto-planetary disk is dominated by its gas, however, the presence of dust grains has a major role in its evolution.

  5. Prime Directive - Wikipedia

    en.wikipedia.org/wiki/Prime_Directive

    Prime Directive. In the fictional universe of Star Trek, the Prime Directive (also known as "Starfleet General Order 1", and the "non-interference directive") is a guiding principle of Starfleet that prohibits its members from interfering with the natural development of alien civilizations. [ 1] Its stated aim is to protect unprepared ...

  6. Archaeoastronomy and Stonehenge - Wikipedia

    en.wikipedia.org/wiki/Archaeoastronomy_and...

    Archaeoastronomy and Stonehenge. The sunlight shining through a trilithon at Stonehenge. The silver ratio relationship between Stonehenge, the Great Pyramid and the Equator. The prehistoric monument of Stonehenge has long been studied for its possible connections with ancient astronomy. The site is aligned in the direction of the sunrise of the ...

  7. Primitive streak - Wikipedia

    en.wikipedia.org/wiki/Primitive_streak

    The primitive streak is a structure that forms in the early embryo in amniotes. [1] In amphibians , the equivalent structure is the blastopore . [ 2 ] During early embryonic development , the embryonic disc becomes oval shaped, and then pear-shaped with the broad end towards the anterior, and the narrower region projected to the posterior.

  8. Template:Nearest star systems - Wikipedia

    en.wikipedia.org/wiki/Template:Nearest_star_systems

    The above documentation is transcluded from Template:Nearest star systems/doc. ( edit | history) Editors can experiment in this template's sandbox ( edit | diff) and testcases ( create) pages. Add categories to the /doc subpage. Subpages of this template. Category:

  9. Timothy Beers - Wikipedia

    en.wikipedia.org/wiki/Timothy_Beers

    Timothy Beers. Timothy C. Beers (born June 24, 1957) is an American astrophysicist. Beers teaches at the University of Notre Dame in the Department of Physics (2014–present), where he holds the Notre Dame Chair in Astrophysics. He is a co-founder of the Physics Frontier Center Joint Institute for Nuclear Astrophysics – Center for the ...

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