银河系直径20万光年，光都要走20万年，人类是怎样测量出来的？

Name: 银河系直径20万光年，光都要走20万年，人类是怎样测量出来的？ | Videos | Gan Jing World - Technology for Humanity | Video & Movie Streaming
Uploaded: 2024-03-18T09:22:55.024Z
Duration: 5 min 43 s
Description: "How did humans measure the diameter of the Milky Way, which is 200,000 light-years across and takes... | Videos | Gan Jing World - Technology for Humanity | Video & Movie Streaming

97Video ViewsMar 18, 2024

银河系直径20万光年，光都要走20万年，人类是怎样测量出来的？

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