Kim Kardashian has some serious competition from Buzz Aldrin. The astronaut touted “the first space selfie” on social media Thursday to commemorate his first ever spacewalk.

“Did you know I took the first space selfie during Gemini 12 mission in 1966? BEST SELFIE EVER,” he posted on Instagram.

Aldrin took his first spacewalk 49 years ago today –

an outing that lasted 5 hours and 30 minutes. NASA notes that Aldrin was the first astronaut to practice his spacewalking tasks underwater in a swimming pool. Later, in 1969, he would join Neil Armstrong in the first moon landing.

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Space selfies are now common practice for astronauts, such

as Scott Kelly, who recently broke the U.S. record for most days in space.