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  2. Omega Centauri - Wikipedia

    en.wikipedia.org/wiki/Omega_Centauri

    Omega Centauri (ω Cen, NGC 5139, or Caldwell 80) is a globular cluster in the constellation of Centaurus that was first identified as a non-stellar object by Edmond Halley in 1677. Located at a distance of 17,090 light-years (5,240 parsecs ), it is the largest known globular cluster in the Milky Way at a diameter of roughly 150 light-years. [ 10 ]

  3. Orbital elements - Wikipedia

    en.wikipedia.org/wiki/Orbital_elements

    Two parameters are required to describe the size and the shape of an orbit. Generally any two of these values can be used to calculate any other (as described below), so the choice of which to use is one of preference and the particular use case. Eccentricity (e) — shape of the ellipse, describing how much it deviates from a perfect a circle ...

  4. Omega1 Tauri - Wikipedia

    en.wikipedia.org/wiki/Omega1_Tauri

    Omega 1 Tauri is a solitary, [7] orange hued star in the zodiac constellation of Taurus. It is faintly visible to the naked eye with an apparent visual magnitude of +5.51. [ 2 ] Based upon an annual parallax shift of 11.22 mas as seen from Earth, [ 1 ] it is located about 290 light years from the Sun .

  5. Greek letters used in mathematics, science, and engineering

    en.wikipedia.org/wiki/Greek_letters_used_in...

    the omega constant 0.5671432904097838729999686622... [78] an asymptotic lower bound notation related to big O notation; in probability theory and statistical mechanics, the support; a solid angle [79] [80] the omega baryon; the arithmetic function counting a number's prime factors counted with multiplicity; the density parameter in cosmology [81]

  6. Molniya orbit - Wikipedia

    en.wikipedia.org/wiki/Molniya_orbit

    A Russian satellite constellation called Tyulpan was designed in 1994 to support communications at high latitudes, but it did not progress past the planning phase. [8] In 2015 and 2017 Russia launched two Tundra satellites into a Molniya orbit, despite their name, as part of its EKS early warning system. [15] [16] [17]

  7. Omega Piscium - Wikipedia

    en.wikipedia.org/wiki/Omega_Piscium

    Omega Piscium (Omega Psc, ω Piscium, ω Psc) is a star approximately 106 light years away from Earth, in the constellation Pisces. It has a spectral type of F4IV, meaning it is a subgiant/dwarf star, and it has a temperature of 6,600 kelvins. It may or may not be a close binary star system. Variations in its spectrum were once interpreted as ...

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