How the duck got its neck: Rapid temperature changes from self-shadowing may explain 67P's unusual activity and shape

When Rosetta approached comet Churyumov-Gerasimenko last summer, both its shape and its activity were surprising. It looked like two comets welded together at a skinny neck. A new paper explains how the neck may be steepening itself.

from Planetary Society Blog http://ift.tt/1KfCKpE
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