Sun 360: STEREO Captures Views of the Entire Sun
For the first time, the entire Sun is being imaged all at once.
This has become possible because the two
STEREO satellites orbiting and monitoring the Sun are now on opposite sides of the Sun.
The >above image shows nearly the entire Sun as it appeared one day last week, a few days before maximum exposure.
Full solar images are useful scientifically for a number of reasons, including catching rapidly evolving
coronal mass ejections,
filaments, no matter where they occur on the Sun,
as well as monitoring days-long
active regions without losing them as they rotate out of view.
Even though the
STEREO satellites will continue to drift apart at about 44 degrees per year,
Sun-staring instruments on or near the Earth will augment them to provide a full
>view of the Sun for the next several years.