From a New York Times story by Katrina Miller headlined “The Dark Universe Is Waiting. What Will the Euclid Telescope Reveal?”:

On Saturday, the Euclid spacecraft launched into space on its mission to chart the history of our universe as far back as 10 billion years ago.

The space telescope, built by the European Space Agency, will use its instruments to record more than a third of the extragalactic sky over the next six years, creating the most accurate three-dimensional map of the cosmos to date.