NASA Goddard
@NASAGoddard
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参加 February 2009
143 フォロー中 933K ファン
No shade, but are you ready for the total solar eclipse on August 12?
In this Goddard Glossary, dive into the difference between umbra and penumbra — two parts of the same shadow you may see as the Moon passes in front of the Sun.
Check visibility:
もっと見る
