Friday, October 19, 2012

APOD 1.8

This image was captured in Yellowstone National Park where the geyser pictured exploded in front of a picturesque landscape of stars.  The colors of the aurora is what makes it unique.  The red aurora occurs with atoms high in the earth's atmosphere when they fall from an excited to ground state.  The green occurs in the same situation, except with atoms that are lower in the earth's atmosphere.  The carefully planned photograph captures the wonders of the earth and the sky in one composite image.

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