Astronauts, space scientists, science fiction fans and even President Barack Obama are paying tribute to Leonard Nimoy after the "Star Trek" actor's death was announced today (Feb. 27). Read some of our favorite posts about the actor that played the original Mr. Spock below:
President Barack Obama
NASA astronaut Scott Kelly
Canadian astronaut Chris Hadfield
Space scientist Alan Stern
"Star Trek" actor William Shatner
"Star Trek" actor George Takei
NASA
Astronauts pay tribute