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InSight is a spacecraft which has been designed to explore geology on Mars. It was due to blast off in March and start its job 6 months later. But the US space agency NASA has suspended the launch of the mission because of a faulty seismometer. So what is this instrument for? A question for Dr. Bruce Banerdt, principal investigator at the Mars InSight mission. (Photo: An artist's rendering that depicts the InSight Mars lander studying the interior of Mars. Credit: NASA/JPL-Caltech via AP)
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