{%- set BS = '%c' | format(92) -%}
{
 "meta": {
  "title": "A Beginner's Guide to Stargazing",
  "author": "Community Astronomy Club"
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  "text": "SAMPLE COPY",
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  "title": "Contents",
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 "blocks": [
  {
   "type": "heading",
   "level": "title",
   "text": "A Beginner's Guide to Stargazing"
  },
  {
   "type": "paragraph",
   "style": {
    "align": "center"
   },
   "runs": [
    {
     "text": "From your backyard to the Milky Way",
     "italic": true
    }
   ]
  },
  {
   "type": "heading",
   "level": 1,
   "text": "1. Why Stargaze?"
  },
  {
   "type": "paragraph",
   "runs": [
    {
     "text": "Stargazing needs no licence and almost no gear. On any clear night you can find "
    },
    {
     "text": "planets",
     "bold": true
    },
    {
     "text": ", trace constellations, and watch the "
    },
    {
     "text": "phases of the Moon",
     "highlight": "yellow"
    },
    {
     "text": ". The apparent brightness of an object is described by its "
    },
    {
     "text": "magnitude",
     "bold": true,
     "footnote": "Magnitude: a logarithmic brightness scale. Smaller numbers mean brighter objects; the faintest naked-eye stars are about magnitude 6."
    },
    {
     "text": ", and a pair of binoculars already reveals thousands of objects invisible to the naked eye. A community list of monthly highlights is maintained at "
    },
    {
     "link": "https://example.com/sky-calendar",
     "text": "the example sky calendar"
    },
    {
     "text": "."
    }
   ]
  },
  {
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   "runs": [
    {
     "text": "Text styles used in this handbook: "
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    {
     "text": ", "
    },
    {
     "text": "double underline",
     "underline": "double"
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    {
     "text": ", "
    },
    {
     "text": "outdated advice",
     "strike": true
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    {
     "text": ", H"
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    {
     "text": "2",
     "subscript": true
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    {
     "text": "O ice on Mars, the 10"
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     "text": "th",
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    {
     "text": " brightest star, "
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     "text": "small caps notes",
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     "text": ", "
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     "text": "warning style",
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     "text": "."
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   "type": "heading",
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   "text": "2. Understanding Brightness"
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   "type": "paragraph",
   "runs": [
    {
     "text": "Two stars that differ by five magnitudes differ in brightness by a factor of exactly "
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     "text": ". The general relation between magnitude and flux is:"
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  },
  {
   "type": "heading",
   "level": 1,
   "text": "3. Choosing Your Equipment"
  },
  {
   "type": "table",
   "caption": "Common telescope types at a glance",
   "header_rows": 2,
   "col_widths": [
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    14,
    14,
    14,
    38
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   "rows": [
    [
     {
      "text": "Type",
      "rowspan": 2,
      "style": {
       "bold": true,
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       "size": 10,
       "indent_first": 0
      }
     },
     {
      "text": "Specifications",
      "colspan": 3,
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      "text": "Best For",
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      "text": "Aperture",
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      "text": "Focal ratio",
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      "text": "Weight",
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      "text": "Refractor",
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     {
      "text": "60–120 mm",
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     {
      "text": "f/8–f/12",
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     {
      "text": "Light",
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     {
      "text": "The Moon, planets, double stars",
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     {
      "text": "Reflector",
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     {
      "text": "114–250 mm",
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       "indent_first": 0
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     },
     {
      "text": "f/4–f/8",
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     {
      "text": "Medium",
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     {
      "text": "Nebulae, galaxies, star clusters",
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      "text": "Catadioptric",
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     {
      "text": "90–235 mm",
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     {
      "text": "f/10",
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      "text": "Medium",
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     {
      "text": "All-round use, astrophotography",
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     "type": "paragraph",
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       "text": "Tip: give your eyes at least 20 minutes in the dark before observing faint objects.",
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   "type": "heading",
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   "text": "4. What to Observe Through the Year"
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   "caption": "Seasonal highlights for northern observers",
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     {
      "text": "Season",
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     {
      "text": "Highlights",
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       "align": "center",
       "size": 10,
       "indent_first": 0
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     {
      "text": "Best viewing time",
      "style": {
       "bold": true,
       "align": "center",
       "size": 10,
       "indent_first": 0
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     }
    ],
    [
     "Spring",
     "Galaxies in Leo and Virgo",
     "22:00–01:00"
    ],
    [
     "Summer",
     "The Milky Way core, Scorpius",
     "23:00–02:00"
    ],
    [
     "Autumn",
     "Andromeda Galaxy, Pegasus",
     "21:00–00:00"
    ],
    [
     "Winter",
     "Orion Nebula, Pleiades",
     "20:00–23:00"
    ]
   ],
   "caption_label": "Table "
  },
  {
   "type": "chart",
   "chart_type": "bar",
   "title": "Average clear nights per season (sample data)",
   "categories": [
    "Spring",
    "Summer",
    "Autumn",
    "Winter"
   ],
   "series": [
    {
     "name": "Clear nights",
     "values": [
      14,
      18,
      16,
      11
     ]
    }
   ],
   "width_mm": 120,
   "caption": "Average clear nights per season",
   "caption_label": "Figure "
  },
  {
   "type": "chart",
   "chart_type": "pie",
   "title": "A typical two-hour observation session",
   "categories": [
    "Setting up",
    "Observing",
    "Taking notes",
    "Packing up"
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   "series": [
    {
     "name": "Share",
     "values": [
      20,
      60,
      12,
      8
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    }
   ],
   "width_mm": 110,
   "caption": "How observation time is spent",
   "caption_label": "Figure "
  },
  {
   "type": "chart",
   "chart_type": "line",
   "title": "End of astronomical twilight (sample city)",
   "categories": [
    "Mar",
    "May",
    "Jul",
    "Sep",
    "Nov"
   ],
   "series": [
    {
     "name": "Summer half",
     "values": [
      19.8,
      21.3,
      22.1,
      20.2,
      18.7
     ]
    },
    {
     "name": "With daylight saving",
     "values": [
      20.8,
      22.3,
      23.1,
      21.2,
      19.7
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    }
   ],
   "width_mm": 130,
   "caption": "When true darkness begins",
   "caption_label": "Figure "
  },
  {
   "type": "heading",
   "level": 1,
   "text": "5. A Simple Observation Routine"
  },
  {
   "type": "ordered_list",
   "child_format": "a",
   "items": [
    {
     "text": "Plan before dark.",
     "children": [
      "Check the weather and the Moon phase",
      "Pick three targets from a sky map"
     ]
    },
    {
     "text": "Set up and cool down.",
     "children": [
      "Let the telescope reach outdoor temperature",
      "Align the finder on a bright star"
     ]
    },
    "Observe from bright to faint, and sketch what you see."
   ]
  },
  {
   "type": "bullet_list",
   "items": [
    "Red flashlight",
    "Star chart or app",
    "Notebook and pencil",
    "Warm clothing"
   ]
  },
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   "type": "page_break"
  },
  {
   "type": "heading",
   "level": 1,
   "text": "6. Two Mind Maps for Quick Reference"
  },
  {
   "type": "paragraph",
   "text": "The two mind maps below were generated by the Mind Map Generator plugin and passed into this plugin through image slots slot1 and slot2."
  },
  {
   "type": "image",
   "src": "slot1",
   "width_mm": 150,
   "align": "center",
   "caption": "Night sky objects at a glance",
   "caption_label": "Figure "
  },
  {
   "type": "image",
   "src": "slot2",
   "width_mm": 150,
   "align": "center",
   "caption": "Telescope types compared",
   "caption_label": "Figure "
  },
  {
   "type": "section_break"
  },
  {
   "type": "heading",
   "level": 1,
   "text": "Appendix: Further Reading"
  },
  {
   "type": "paragraph",
   "text": "This appendix starts a new section; the watermark and page numbers continue automatically."
  },
  {
   "type": "bullet_list",
   "items": [
    "Turn Left at Orion — a classic starter guide",
    "NASA Night Sky Network — free monthly maps",
    "Local astronomy club open nights"
   ]
  }
 ]
}