Leonard Nimoy, best known for playing Mr. Spock on the television series “Star Trek,” died Friday morning at his home in the Bel Air section of Los Angeles, the New York Times reported. He was 83.

Nimoy was the only actor to appear in every episode of the original “Star Trek” television series, which made its debut on NBC in 1966. His role as Spock, the mixed Earthling-Vulcan aboard the starship Enterprise, made him a TV star for the generations, with a slew of memes to prove it. Here are some of the best Twitter memes featuring the legendary first officer:

His wife, Susan Bay Nimoy, confirmed to the New York Times that the cause of death was end-state chronic obstructive pulmonary disease. Nimoy announced last year he was battling the disease because of years of smoking, even though he had kicked the habit three decades earlier. The “Star Trek” star was hospitalized at the UCLA Medical Center for intense chest pains last week, but was subsequently released, TMZ reported.

According to the New York Times, Nimoy is survived by his wife; his children, Adam Nimoy and Julie Nimoy; a stepson, Aaron Bay Schuck; six grandchildren; one great-grandchild; and an older brother, Melvin Nimoy.