Aurora Is Seen Over Greenland on April 2, 2011 (IMAGE)

NASA/Goddard Space Flight Center

Aurora Is Seen Over Greenland on April 2, 2011

Caption

An aurora is seen over Greenland on April 2, 2011. Two NASA sounding rockets will launch into a particular type of aurora called a cusp aurora this winter to study different processes related to the particle acceleration that causes cusp auroras. The cusp is a region near the North Pole where Earth's magnetic field is directly connected to the solar wind, allowing daytime auroras to form.

Credit

Credits: NASA/University of Maryland, College Park/Robert Michell

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