Why the most powerful space telescope ever needs to be kept really, really cold

After spending 12 days on the International Space Station, Japanese billionaire Yusaku Maezawa is safely back on Earth. Next stop: the moon with Elon Musk.

Space and time: How to better understand biological processes in plants

LAUNCH OF JAMES WEBB SPACE TELESCOPE (JWST), Dec 25, 2021, French Guiana, 7:20 am ET