Meteorologist Craig Moeller talks about dangerous heat, sun ray protection, and images from the world's largest telescope.

The Chandra X-ray telescope and other observatories are being used to study stars that could potentially harbor habitable planets. Future observatories will use the data to narrow down the list ...

While JAXA's Suzaku X-ray telescope came to the end of its scientific mission in 2015, XMM-Newton remains operational more than a quarter of a century since its launch; a testament to its designers ...