Europe's Herschel space telescope went to sleep on 17 June, when controllers emptied its fuel tanks and commanded the observatory to end all communications,  the European Space Agency (ESA) announced.

The final command to the Herschel satellite was sent on 17 June at 12:25 GMT (14:25 CEST), marking the end of operations for ESA’s space observatory.

Herschel, which is considered the largest and most powerful infrared telescope in space, carried out around 35,000 scientific observations...

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