NASA Webb TelescopeVerified account

Tower test: complete #NASAWebb testing teams successfully extended and deployed a critical part of the observatory called the Deployable Tower Assembly. During the test, the tower was extended in the same way it will once in space! More: https://go.nasa.gov/30wgNl7 pic.twitter.com/8COEWGVPKV

Humans for scale. Webb's deployable tower which connects the upper and lower sections of the spacecraft is shown here fully extended. During the recently successful test the tower was commanded to deploy and extend 48 inches (1.2 meters) over the course of about 5 hours. #JWSTpic.twitter.com/QFjL2uIYxO

And this picture shows the deployable tower fully stowed and compacted. By creating a space between the two, it allows for Webb’s active and passive cooling systems to bring its mirrors and sensors down to staggeringly cold temperatures required to perform optimal science.pic.twitter.com/MQyB92B3fE