NASA's Don Pettit has been back on Earth for a couple of months but he's still got some amazing photos to share ...

A team of astronomers have put together the largest, most detailed map of the universe ever created – and you can explore it now.

Abstract: This paper presents an ultra-wide band antipodal Vivaldi antenna that is designed to operate across a frequency range from 15 GHz to 40 GHz, making it suitable for 5G, mm-wave bands, ...