"space motion" meaning in English

{
  "forms": [
    {
      "form": "space motions",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "space motion (plural space motions)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
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          "source": "w"
        },
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          "name": "Terms with Finnish translations",
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        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Astronomy",
          "orig": "en:Astronomy",
          "parents": [
            "Sciences",
            "Space",
            "All topics",
            "Nature",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "The real or apparent motion of a star etc. through space."
      ],
      "id": "en-space_motion-en-noun-qoP-yTic",
      "links": [
        [
          "astronomy",
          "astronomy"
        ],
        [
          "star",
          "star"
        ]
      ],
      "raw_glosses": [
        "(astronomy) The real or apparent motion of a star etc. through space."
      ],
      "topics": [
        "astronomy",
        "natural-sciences"
      ],
      "translations": [
        {
          "code": "fi",
          "lang": "Finnish",
          "sense": "real or apparent motion",
          "word": "avaruusliike"
        }
      ]
    }
  ],
  "word": "space motion"
}

{
  "forms": [
    {
      "form": "space motions",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "space motion (plural space motions)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "English countable nouns",
        "English entries with incorrect language header",
        "English lemmas",
        "English multiword terms",
        "English nouns",
        "Entries with translation boxes",
        "Pages with 1 entry",
        "Pages with entries",
        "Terms with Finnish translations",
        "en:Astronomy"
      ],
      "glosses": [
        "The real or apparent motion of a star etc. through space."
      ],
      "links": [
        [
          "astronomy",
          "astronomy"
        ],
        [
          "star",
          "star"
        ]
      ],
      "raw_glosses": [
        "(astronomy) The real or apparent motion of a star etc. through space."
      ],
      "topics": [
        "astronomy",
        "natural-sciences"
      ]
    }
  ],
  "translations": [
    {
      "code": "fi",
      "lang": "Finnish",
      "sense": "real or apparent motion",
      "word": "avaruusliike"
    }
  ],
  "word": "space motion"
}