"Sgr A*" meaning in Translingual

{
  "etymology_text": "From being the hidden gravitational centre associated with the astronomical radio source Sgr A, the astrophysical radio source associated with the centre of the Milky Way Galaxy.",
  "head_templates": [
    {
      "args": {
        "1": "mul",
        "2": "proper noun"
      },
      "expansion": "Sgr A*",
      "name": "head"
    }
  ],
  "lang": "Translingual",
  "lang_code": "mul",
  "pos": "name",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Translingual entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "Sagittarius A*; the central supermassive black hole of the Milky Way Galaxy"
      ],
      "id": "en-Sgr_A*-mul-name-q20~UX~i",
      "links": [
        [
          "Sagittarius A*",
          "Sagittarius A*#English"
        ],
        [
          "supermassive black hole",
          "supermassive black hole"
        ]
      ],
      "related": [
        {
          "english": "Pōwehi; the first directly imaged central supermassive blackhole of a galaxy",
          "word": "M87*"
        }
      ]
    }
  ],
  "word": "Sgr A*"
}

{
  "etymology_text": "From being the hidden gravitational centre associated with the astronomical radio source Sgr A, the astrophysical radio source associated with the centre of the Milky Way Galaxy.",
  "head_templates": [
    {
      "args": {
        "1": "mul",
        "2": "proper noun"
      },
      "expansion": "Sgr A*",
      "name": "head"
    }
  ],
  "lang": "Translingual",
  "lang_code": "mul",
  "pos": "name",
  "related": [
    {
      "english": "Pōwehi; the first directly imaged central supermassive blackhole of a galaxy",
      "word": "M87*"
    }
  ],
  "senses": [
    {
      "categories": [
        "Pages with 1 entry",
        "Pages with entries",
        "Translingual entries with incorrect language header",
        "Translingual lemmas",
        "Translingual proper nouns",
        "Translingual terms spelled with *"
      ],
      "glosses": [
        "Sagittarius A*; the central supermassive black hole of the Milky Way Galaxy"
      ],
      "links": [
        [
          "Sagittarius A*",
          "Sagittarius A*#English"
        ],
        [
          "supermassive black hole",
          "supermassive black hole"
        ]
      ]
    }
  ],
  "word": "Sgr A*"
}