"astro-" meaning in Czech

{
  "etymology_templates": [
    {
      "args": {
        "1": "cs",
        "2": "grc",
        "3": "ἄστρον"
      },
      "expansion": "Borrowed from Ancient Greek ἄστρον (ástron)",
      "name": "bor+"
    }
  ],
  "etymology_text": "Borrowed from Ancient Greek ἄστρον (ástron).",
  "head_templates": [
    {
      "args": {
        "1": "cs",
        "2": "prefix"
      },
      "expansion": "astro-",
      "name": "head"
    }
  ],
  "lang": "Czech",
  "lang_code": "cs",
  "pos": "prefix",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Czech entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages using catfix",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 16 entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        }
      ],
      "glosses": [
        "astro-"
      ],
      "id": "en-astro--cs-prefix-H6CzaSO1",
      "links": [
        [
          "astro-",
          "astro-#English"
        ]
      ],
      "related": [
        {
          "word": "asteroid"
        },
        {
          "word": "astra"
        },
        {
          "word": "astrální"
        }
      ],
      "tags": [
        "morpheme"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "[astro ]"
    }
  ],
  "word": "astro-"
}

{
  "etymology_templates": [
    {
      "args": {
        "1": "cs",
        "2": "grc",
        "3": "ἄστρον"
      },
      "expansion": "Borrowed from Ancient Greek ἄστρον (ástron)",
      "name": "bor+"
    }
  ],
  "etymology_text": "Borrowed from Ancient Greek ἄστρον (ástron).",
  "head_templates": [
    {
      "args": {
        "1": "cs",
        "2": "prefix"
      },
      "expansion": "astro-",
      "name": "head"
    }
  ],
  "lang": "Czech",
  "lang_code": "cs",
  "pos": "prefix",
  "related": [
    {
      "word": "asteroid"
    },
    {
      "word": "astra"
    },
    {
      "word": "astrální"
    }
  ],
  "senses": [
    {
      "categories": [
        "Czech entries with incorrect language header",
        "Czech lemmas",
        "Czech prefixes",
        "Czech terms borrowed from Ancient Greek",
        "Czech terms derived from Ancient Greek",
        "Czech terms with IPA pronunciation",
        "Pages using catfix",
        "Pages with 16 entries",
        "Pages with entries"
      ],
      "glosses": [
        "astro-"
      ],
      "links": [
        [
          "astro-",
          "astro-#English"
        ]
      ],
      "tags": [
        "morpheme"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "[astro ]"
    }
  ],
  "word": "astro-"
}