{
  "id": "astronomy-20260830-102543",
  "topic_id": "astronomy",
  "title": "天文：尺度与节律",
  "tag": "天文",
  "category": "astronomy",
  "date": "2026-08-30",
  "time_sgt": "10:25",
  "datetime_sgt": "2026-08-30T10:25:43+0800",
  "year": "2026",
  "month": "08",
  "day": "30",
  "excerpt": "天文把人从村口的井，拉到银河的岸。古人观星定农时，今人用望远镜与射电阵听宇宙的噪声。岁差让恒星缓慢挪位，交食证明影与几何，行星逆行其实是轨道投影…",
  "narration": "天文把人从村口的井，拉到银河的岸。古人观星定农时，今人用望远镜与射电阵听宇宙的噪声。岁差让恒星缓慢挪位，交食证明影与几何，行星逆行其实是轨道投影的戏法，不是天象惩罚。光速把距离变成时间：我们看见的星光，常常是过去的信。我们站在一颗绕星旋转的尘埃上，却能用光年说话，用红移读膨胀。一分钟只留尺度感：抬头不是逃避，是把焦虑放回正确的比例——宇宙很大，昼夜有常，而清醒的观察，仍然珍贵。在星空面前，人会变小，也会变稳。",
  "video_url": "/philo/2026/08/30/astronomy-20260830-102543/episode.mp4",
  "text_url": "/philo/2026/08/30/astronomy-20260830-102543/narration.txt",
  "poster_url": "/philo/2026/08/30/astronomy-20260830-102543/poster.jpg",
  "json_url": "/philo/2026/08/30/astronomy-20260830-102543/meta.json",
  "duration_sec": 60
}