Leonard Nimoy died on Friday at his home in Los Angeles.

Nimoy was victim to end-stage chronic obstructive pulmonary disease.

COPD was a disease that Leonard Nimoy wrestled with because of his years of smoking, even though he quit almost 30 years ago.

Leonard Nimoy was most popular for his role as Mr. Spock in the Star Trek franchise, but he was also a photographer, a musician, a writer, and many other things.

When news of Leonard Nimoy’s death began to spread on Friday, many of his family, his close friends, and his colleagues quickly paid tribute to him through social media.

Leonard Nimoy’s granddaughter, writing on his Twitter page, announced his passing.

Leonard Nimoy 1931-2015 Read: http://t.co/pw7zYRRlts

— Leonard Nimoy (@TheRealNimoy) February 27, 2015

She said, “Hi all, as you all know, my Grandpa passed away this morning at 8:40 from end-stage chronic obstructive pulmonary disease. He was an extraordinary man, husband, grandfather, brother, actor, author-the list goes on- and friend. Thank you for the warm condolences. May you all LLAP. – Dani”

Sweet words from an admiring granddaughter.

His former co-stars and colleagues showed their love and their sadness for Leonard Nimoy’s passing.

my heart is broken. i love you profoundly my dear friend. and i will miss you everyday. may flights… https://t.co/WPJmt1X4ox

— Zachary Quinto (@ZacharyQuinto) February 27, 2015

Well done, sir. Many thanks for all you gave us. You'll be greatly missed & forever remembered. https://t.co/YsDKpxtAfJ

— Seth Green (@SethGreen) February 27, 2015

Of course, Patrick Stewart was kind enough to share a few words about Leonard Nimoy.

It is with sadness that I heard of Leonard Nimoy's death. I was lucky to spend many happy, inspiring hours with him. He won't be forgotten.

— Patrick Stewart (@SirPatStew) February 27, 2015

Even President Obama took time out of his schedule to tweet his condolences.

"Long before being nerdy was cool, there was Leonard Nimoy." —President Obama #LLAP

— Barack Obama (@BarackObama) February 27, 2015

The world lost a great man, for sure. But, Leonard Nimoy gave us the gift of Mr. Spock, and that gift will keep giving to generations of young nerds to come.

What is your favorite Spock quote?