VIDEO: A billion pixels for a billion stars

The European Space Agency has launched a spacecraft with one of the most high-powered digital cameras ever built.

It aims to create a three-dimensional map of the Milky Way by measuring the motion of stars over five years.

Pallab Ghosh reports.

Article source: http://www.bbc.co.uk/news/science-environment-25450068#sa-ns_mchannel=rss&ns_source=PublicRSS20-sa

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