The Hubble Space Telescope peers deep into the universe and sends breathtaking images back to Earth. But when its infrared camera, NICMOS, lost its supply of cooling liquid nitrogen the pictures stopped. NASA turned to physicist Erin Pettyjohn and her team at Kirtland Air Force Base in New Mexico. They design and build very tiny refrigerators called cryocoolers. These little machines can cool things down to a very chilly 70 Kelvin. That's -203 C or -334 F! One of Erin's cryocoolers is now flying on the Hubble and has "chilled out" the camera so it can be sending back amazing images for years to come.
Temperature scales - Fahrenheit, Celcius, Kelvin
Hubble Space Telescope