{
  "export": {
    "source": "https://urth.darkrealm.vip/thread/urth/3034",
    "note": "Exported from an unofficial mirror of a public mailing list. Copyright in each message remains with the person who wrote it.  Email addresses are obscured as `user at host`, the form the original archive published. This file was rebuilt from parsed fields rather than retained headers, so it is faithful in content but not byte-exact.",
    "addresses": "obscured as 'user at host'"
  },
  "archive": "urth",
  "thread": {
    "id": 3034,
    "subject": "Green's Diameter II",
    "messages": 1,
    "voices": 1,
    "first": "2002-03-13T22:52:20+00:00",
    "last": "2002-03-13T22:52:20+00:00"
  },
  "messages": [
    {
      "message_id": "<urth-v0203-348@digest.urth.net>",
      "from": {
        "name": "Michael Andre-Driussi",
        "address": "mantis at siriusfiction.com"
      },
      "date": "2002-03-13T22:52:20+00:00",
      "subject": "(urth) Green's Diameter II",
      "in_reply_to": null,
      "reply_link": null,
      "blocks": [
        {
          "kind": "text",
          "depth": 0,
          "text": "New experiment: we want to see how far away Earth-like planets would be in\norder to have an angular diameter about equal to the Moon and the Sun seen\nfrom Earth (0.52 degrees).\n\nThree planet sizes: Small, Medium, Large.\n\n                  ANGULAR      EST. DISTANCE     SAME\n                  DIAMETER @   FOR ANGULAR       DISTANCE\n       DIAMETER   105,000 mi   DIAMETER = 0.52   IN LEAGUES\nSMALL   6,200 mi  3.38 deg.      700,000 miles   233,333\nMEDIUM  8,000 mi  4.37 deg.      900,000 miles   300,000\nLARGE  10,000 mi  5.46 deg.    1,055,000 miles   351,667\n\n\nThis experiment is to help us all visualize what we are talking about.  I\nonly picked the target angular-diameter of 0.52 because of the familiar\nsize for us Earth-bound.\n\nRegarding the problem of distance for the inhumi to fly across.  Well, we\nhad earlier on more or less agreed that there were some serious technical\nproblems with flying across--actually, granting an ability to survive\nvacuum during the transit was the easiest part . . . the hardest parts\nseemed to be escape velocity and surviving re-entry.\n\nAt the time, iirc, we here decided to file it under magic and see what\ndeveloped.  Sure enough, there were suggestions in RTTW that \"flight\" was\nmaybe an easy cover-story for the humans.  So what do they =really= do?  I\ndon't know, but they seem to be lying about it!\n\nAnyway, the thing seems magical/impossible no matter what the distance is,\nand in this sense distance doesn't really matter (although if one believes\nthe inhumi have a distance-limited teleporation ability, then yes, distance\ndefines it).\n\n=mantis="
        }
      ]
    }
  ]
}