"periastra" meaning in All languages combined

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  "lang_code": "en",
  "pos": "noun",
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          "ref": "1988 January 19, D. V. Gal’tsov, É. Masar, “Motion of bodies in Schwarzschild spacetime with conical singularities”, in Theoretical and Mathematical Physics, volume 80, published August 1989:",
          "text": "[…]apoastra (i) and the circle of the periastra (2).",
          "type": "quote"
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        {
          "ref": "1999 April 22, Jack J. Lissauer, “Three planets for Upsilon Andromedae”, in Nature, volume 398, Macmillan Magazines Ltd, figure 1, page 659, column 2:",
          "text": "The rest of the plot shows the temporal evolution of the periastra and apoastra of the three planets using the nominal parameters on the left as initial conditions.",
          "type": "quote"
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        {
          "ref": "2010, Imke de Pater, Jack J. Lissauer, “Exoplanet Formation Models”, in Planetary Sciences, 2nd edition, Cambridge University Press, →ISBN, figure 13.28, page 547, column 2:",
          "text": "The planets’ masses are given in units of M_⊕ and the periastra, semimajor axes and apoastra are shown below.",
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      "form_of": [
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          "word": "periastron"
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      "glosses": [
        "plural of periastron"
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      "id": "en-periastra-en-noun-4ZHUHtvJ",
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        },
        {
          "ref": "1999 April 22, Jack J. Lissauer, “Three planets for Upsilon Andromedae”, in Nature, volume 398, Macmillan Magazines Ltd, figure 1, page 659, column 2:",
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          "ref": "2010, Imke de Pater, Jack J. Lissauer, “Exoplanet Formation Models”, in Planetary Sciences, 2nd edition, Cambridge University Press, →ISBN, figure 13.28, page 547, column 2:",
          "text": "The planets’ masses are given in units of M_⊕ and the periastra, semimajor axes and apoastra are shown below.",
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