After 116 days of being subjected to extremely frigid temperatures like that in space, the heart of the James Webb Space Telescope, the Integrated Science Instrument Module (ISIM) and its sensitive instruments, emerged unscathed from the thermal vacuum chamber at NASA’s Goddard Space Flight Center in Greenbelt, Maryland.
We know how, but not why. This video is a great explanation of our knowledge thus far. Thanks MinutePhysics, or 6 Minute Physics in this case.
Physicists have developed the first ever long-distance optical tractor beam, and it can both repel and attract objects.
This is an old but amazing video. Worth sharing again.