In celebration of 50 years of astronauts bravely stepping out into the vacuum of space to performs repairs and tests high above the Earth, NASA has released a new spacewalk documentary titled "Suit Up." 

On June 3, 1965, astronaut Ed White made history when he became the first American to perform a spacewalk, a moment he found so exhilarating that he was reluctant to return to his spacecraft. "I'm coming back in," White eventually told NASA. "... and it's the saddest moment of my life."

Since White's historic leap, more than 370 spacewalks (otherwise known as extravehicular activities) have taken place, focused on everything from Skylab to the Hubble telescope and the International Space Station. In "Suit Up," NASA covers many of these memorable moments, as well as featuring interviews with astronauts, administrators and space suit designers. 

For those interested in where spacewalks will go over the next 50 years, NASA hints at the possibilities — from around the moon, to visiting an asteroid, to human missions on Mars. 

"We will pioneer space, not just to visit, but to stay," the agency says in the video. 

Set aside 30 minutes and check out "Suit Up" below.