Star Trek fans are still in mourning for Leonard Nimoy, the actor famous for his role as Spock, who died on Friday at the age of 83.
The beloved sci-fi character was known by the Vulcan "live long and prosper" hand gesture.
Fans, both famous and otherwise, have been using the gesture to pay tribute to Nimoy.
In a fitting extraterrestrial tribute to the late star, NASA Astronaut Terry Virts has tweeted a picture of the Vulcan gesture from the International Space Station, looking down at Nimoy's birthplace of Boston.
It's enough to make even Spock a little bit emotional.