Herschel completes its 'cool' journey in space
Tuesday, April 30, 2013 - 09:30
in Astronomy & Space
The Herschel observatory, a European space telescope for which NASA helped build instruments and process data, has stopped making observations after running out of liquid coolant as expected. The European Space Agency mission, launched almost four years ago, revealed the universe's "coolest" secrets by observing the frigid side of planet, star and galaxy formation.