NASA's James Webb Space Telescope is ready for calibration after chilling out

The James Webb Space Telescope is one step closer to probing the depths of the universe. On Wednesday, NASA announced that it was ready to start taking test images and aligning the optics of the JWST after the telescope's instrumentation reached its final operating temperature of minus 448 degrees Fahrenheit (or minus 267 degrees Celsius) partway through last week. Cool news! Webb's MIRI instrument recently passed through its critical "pinch point" and cooled to just a few kelvins above absolute...