Thumbs Up From Out of This World
ASA spacewalkers (from left) Bob Behnken and Chris Cassidy give a thumbs up during a spacewalk to install hardware and upgrade International Space Station systems.
Thumbs Up From Out of This World | #Astronomy
The Mocha Uson Science Blog is the Official Fan and Commentary blog that reimagines Mocha as a scholarly woman who has a penchant for the sciences, arts, history and literature.
Mocha Uson Blog (Science) 