A space telescope built with expertise from Cardiff University is coming to the end of its mission.
The Herschel Space Observatory is about to make its 50,000th measurement using the biggest mirror ever to be sent into space.
It's been helping transform our understanding of the Universe and how stars are formed. But its coolant is due to run out in March and scientists are deciding what happens next. One idea is to crash it into the Moon.
Andrew Jones reports.
Pictures: ESA/AOES Medialab