{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "https://github.com/api-evangelist/nasa/blob/main/json-schema/apod-image.json",
  "title": "APOD Image",
  "description": "An Astronomy Picture of the Day entry from NASA's APOD service.",
  "type": "object",
  "properties": {
    "date": {
      "type": "string",
      "format": "date",
      "description": "The date of the APOD image (YYYY-MM-DD)."
    },
    "explanation": {
      "type": "string",
      "description": "Explanation of the image written by a professional astronomer."
    },
    "hdurl": {
      "type": "string",
      "format": "uri",
      "description": "URL of the high-resolution image."
    },
    "media_type": {
      "type": "string",
      "enum": ["image", "video"],
      "description": "The type of media returned."
    },
    "service_version": {
      "type": "string",
      "description": "The version of the APOD service."
    },
    "title": {
      "type": "string",
      "description": "Title of the APOD image."
    },
    "url": {
      "type": "string",
      "format": "uri",
      "description": "URL of the image or video."
    },
    "copyright": {
      "type": "string",
      "description": "Copyright holder of the image, if not public domain."
    },
    "thumbnail_url": {
      "type": "string",
      "format": "uri",
      "description": "URL of the video thumbnail when media_type is video."
    }
  },
  "required": ["date", "explanation", "media_type", "title", "url"]
}