"supernova impostor" meaning in English

{
  "etymology_text": "From being mistaken for a supernova.",
  "forms": [
    {
      "form": "supernova impostors",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "supernova impostor (plural supernova impostors)",
      "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"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Stars",
          "orig": "en:Stars",
          "parents": [
            "Celestial bodies",
            "Space",
            "Nature",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "langcode": "en",
          "name": "Supernovas",
          "orig": "en:Supernovas",
          "parents": [],
          "source": "w"
        }
      ],
      "coordinate_terms": [
        {
          "word": "failed supernova"
        },
        {
          "word": "supernova"
        },
        {
          "word": "hypernova"
        },
        {
          "word": "nova"
        }
      ],
      "glosses": [
        "An extremely energetic stellar flare event that is bright enough to be mistaken for a supernova, but through later spectral analysis is revealed to not be one."
      ],
      "id": "en-supernova_impostor-en-noun-7SngbcS3",
      "links": [
        [
          "astronomy",
          "astronomy"
        ],
        [
          "stellar flare",
          "stellar flare"
        ],
        [
          "supernova",
          "supernova"
        ]
      ],
      "raw_glosses": [
        "(astronomy) An extremely energetic stellar flare event that is bright enough to be mistaken for a supernova, but through later spectral analysis is revealed to not be one."
      ],
      "topics": [
        "astronomy",
        "natural-sciences"
      ]
    }
  ],
  "sounds": [
    {
      "rhymes": "-ɒstə(ɹ)"
    }
  ],
  "word": "supernova impostor"
}

{
  "coordinate_terms": [
    {
      "word": "failed supernova"
    },
    {
      "word": "supernova"
    },
    {
      "word": "hypernova"
    },
    {
      "word": "nova"
    }
  ],
  "etymology_text": "From being mistaken for a supernova.",
  "forms": [
    {
      "form": "supernova impostors",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "supernova impostor (plural supernova impostors)",
      "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",
        "Pages with 1 entry",
        "Pages with entries",
        "Rhymes:English/ɒstə(ɹ)",
        "Rhymes:English/ɒstə(ɹ)/7 syllables",
        "en:Stars",
        "en:Supernovas"
      ],
      "glosses": [
        "An extremely energetic stellar flare event that is bright enough to be mistaken for a supernova, but through later spectral analysis is revealed to not be one."
      ],
      "links": [
        [
          "astronomy",
          "astronomy"
        ],
        [
          "stellar flare",
          "stellar flare"
        ],
        [
          "supernova",
          "supernova"
        ]
      ],
      "raw_glosses": [
        "(astronomy) An extremely energetic stellar flare event that is bright enough to be mistaken for a supernova, but through later spectral analysis is revealed to not be one."
      ],
      "topics": [
        "astronomy",
        "natural-sciences"
      ]
    }
  ],
  "sounds": [
    {
      "rhymes": "-ɒstə(ɹ)"
    }
  ],
  "word": "supernova impostor"
}