CSA Astronaut Jeremy Hansen Sets Out for Geology Field Training in the High Arctic

2013-07-18 - Jeremy Hansen via Twitter on July 18 - These enormous selenite crystals were formed by water heated by meteor impact that dissolved gypsum & later re-crystallized as the crater cooled.

From July 16 to 25, 2013, Canadian Space Agency Astronaut Jeremy Hansen is in the High Arctic to learn methods and techniques for conducting geological fieldwork that could be applied during future missions to the Moon or an asteroid. Hansen is accompanying Western University's Dr. Osinski and his team from the Centre for Planetary Science and Exploration as they study the Haughton impact crater on Devon Island, Nunavut. (Credit: Canadian Space Agency)