NASAのインスタグラム(nasa) - 3月28日 06時41分

Just how big is "Chamber A" at NASA's Johnson Space Center where we'll be testing the James Webb Space Telescope? Well, those aren't tiny people on the right of the door. Chamber A is really big!

NASA's "Chamber A" thermal vacuum testing chamber famous for being used during Apollo missions has now been upgraded and remodeled to accommodate testing the Webb Telescope.
When the next-generation space telescope was being designed, engineers had to ensure there was a place large enough to test it, considering it's as big as a tennis court. That honor fell upon the famous "Chamber A" in the thermal-vacuum test facility at NASA's Johnson Space Center in Houston, Texas.
Chamber A is now the largest high-vacuum, cryogenic-optical test chamber in the world, and made famous for testing the space capsules for NASA's Apollo mission, with and without the mission crew. It is 55 feet (16.8 meters) in diameter by 90 feet (27.4 meters) tall. The door weighs 40 tons and is opened and closed hydraulically.

Image credit: NASA
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