다음 채널에서 시청 가능: Prime Video
시즌 1, 에피소드 4: Charting the motions and changes of the sun and moon may be humankind's oldest astronomical activity. Discover how both objects offer rich opportunities for study. Also learn the precautions to take when observing the sun, which is the only star that can be seen up close and in detail.
2020년 6월 1일 · 32분