“I watched his show when I was in space,” Scott Kelly, the NASA astronaut, wrote on Twitter. “It made me feel more connected to the planet, its people and cultures and made my time there more palatable. He inspired me to see the world up close.”

In a statement posted to Twitter, the actress Asia Argento, Mr. Bourdain’s girlfriend, said she was “beyond devastated” by his death.

“His brilliant, fearless spirit touched and inspired so many, and his generosity knew no bounds. He was my love, my rock, my protector,” she wrote.

Here’s what Mr. Bourdain’s friends and fans had to say about his death and legacy.

‘You shaped the way we see food’

Chefs and food writers remembered Mr. Bourdain fondly for his friendship and the role he played in shaping how his readers and viewers understood food and culture.

“Anthony was a dear friend,” Eric Ripert, the French celebrity chef and restaurateur, said in a statement provided to The New York Times, which he later tweeted a version of. “He was an exceptional human being, so inspiring and generous. One of the great storytellers of our time who connected with so many. I wish him peace. My love and prayers are with his family, friends and loved ones.”