Space Boffins Sue Nelson and the Guardian's Stuart Clark are at the European Space Agency's ESTEC facility in The Netherlands to see the BepiColombo spacecraft - Europe's mission to Mercury. As the LISA Pathfinder mission comes to a successful end, we meet Paul McNamara who's developing the LISA mission for detecting gravitational waves in space. And is Earth really a planet? A new exhibition captures the view from Pluto.
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