Looking at the sun

The video shows three years of time lapse photos of the Sun, taken at the rate of two a day by NASA’s Solar Dynamics Observatory, at a time in the solar flare cycle when flare activity is at its height.

In this video, the Sun looks like it is alive.  But the apparent pulsation is due to variations in the position of the SDO as it orbits the Earth while the Earth orbits the Sun.  Each of the flickers is a solar flare discharging orders of magnitude more energy than all the atomic bomb explosions in history.

Click on NASA – Three Years of SDO Images for background.

Hat tip to kottke.org.

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