NASA Goddard
@NASAGoddard
Welcome to your friendly neighborhood space flight center, home to the largest community of scientists & engineers on Earth.
Joined February 2009
144 Following 931.5K Followers
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:
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