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How do I know it is safe to remove eclipse glasses when viewing a total solar eclipse?

Eclipse glasses are so dark that nothing can be seen through them, except the surface of the sun. When you are looking through the eclipse glasses, if you can see any part of the sun at all, it is ...
James K's user avatar
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Visualized shapes of areas of total and partial solar eclipse

There are purpose-made animations for recent eclipses on the NASA pages: 2021 Annular Solar Eclipse. You can download the video, and with a decent player like vlc, you can thus go back and forth. You ...
planetmaker's user avatar

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