The Eclipse 2017 Umbra Viewed from Space via NASA https://t.co/oehWLr9Ijr http://pic.twitter.com/SBWgvzNo8Q
— martinengwicht (@martinengwicht) August 23, 2017
from Twitter https://twitter.com/martinengwicht
learning by doing
The Eclipse 2017 Umbra Viewed from Space via NASA https://t.co/oehWLr9Ijr http://pic.twitter.com/SBWgvzNo8Q
— martinengwicht (@martinengwicht) August 23, 2017
from Twitter https://twitter.com/martinengwicht