James Webb telescope's coldest instrument reaches operating temperature
The fact that the telescope's cryocooler is acoustically symmetrical such that any vibrations made by each cylinder, and the actual flow of gas, is near-perfectly cancelled out is nothing short of amazing. [0]Real Engineering made a video that covered this and more, which is well worth a watch. [1][0] https://webb.nasa.gov/content/about/innovations/cryocooler.h...[1] https://www.youtube.com/watch?v=aICaAEXDJQQ (The Insane Engineering of James Webb Telescope)