The Overview Effect

From Devour: "First coined by author Frank White in 1987, The Overview Effect is the term used to describe the cognitive shift in awareness caused by the awe-inspiring experience of viewing the Earth from orbit. To mark the 40th anniversary of the famous 'Blue Marble' photograph, [in this video] five astronauts describe their first-hand experience with the... phenomenon."

[via @chelssmeisterr, whose only negative that I can see is that her Twitter handle is impossible for me to spell right without looking it up each and every time. That's my problem, not hers — but still....]