NASA ion thruster, c. 1965. Full caption: "ION THRUSTER 1.5 METER INSTALLATION AT THE ELECTRIC PROPULSION LABORATORY EPL"

Fullsize image: https://diqn32j8nouaz.cloudfront.net...r_fullsize.jpg



Previously:

SpaceX gimbal thrusters - GIF
Saturn I first stage assembly plant - photo
Rocket hinged separation mechanism - GIF
Soyuz rocket booster separation - GIF
Space Shuttle main engine ignition - GIF