可观测宇宙中最大的20个恒星

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Choose a video. After you submit it, it can appear on the home page and the video page.

I have the right to post this and it does not infringe anyone else's rights

The words become a bright text card and are shown like an image.

I have the right to post this and it does not infringe anyone else's rights

You can pick several files (jpg / png / webp, up to 30 MB each, 20 a day). They stay a draft until you submit them from Me.