"International Space Station astronaut Terry Virts (@AstroTerry) tweeted this image of a Vulcan hand salute from orbit as a tribute to actor Leonard Nimoy, who died on Friday, Feb. 27, 2015."
"Leonard Nimoy was an inspiration to multiple generations of engineers, scientists, astronauts, and other space explorers. As Mr. Spock, he made science and technology important to the story, while never failing to show, by example, that it is the people around us who matter most. NASA was fortunate to have him as a friend and a colleague."
"I loved Spock. In 2007, I had the chance to meet Leonard in person. It was only logical to greet him with the Vulcan salute, the universal sign for "Live long and prosper." And after 83 years on this planet - and on his visits to many others - it's clear Leonard Nimoy did just that."