A look at the Sun from September 1 through September 30, 2012. The video combines three wavelengths with similar temperatures, highlighting different parts of the solar corona.
During this segment we also see the start of the Fall Eclipse Season, where Earth moves in between the Solar Dynamics Observatory spacecraft and the Sun. This happens twice a year, for three weeks near the equinox and Earth blocks the view of the Sun for a period of time each day. Any spacecraft observing the Sun from an orbit around Earth has to contend with such eclipses, but SDO’s orbit is designed to minimize them as much as possible.
The first day of fall 2012 was on September 22, 2012. While nothing is different on the Sun, it is Earth’s orbit and tilt providing us with the four different seasons.
Credit: NASA SDO