The photos are from Martin Kennedy’s exquisite Sci-fi Art Tumblr. More at the link, and good luck getting any work done ever again.
You see, from top to bottom, Richard Edlund filming Death Star explosions, Dennis Muren setting up X-Wing and Tie Fighter shots, and Joe Viskocil with the Blockade Runner. All of the guys were hand-picked by John Dykstra for Industrial Light & Magic, a little visual effects company founded by some guy named George Lucas in 1975.
2 Warps to Neptune 
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