171Å Halpha Gif transition Mouse roll-over
171Å back to full disc image in stereoscopic anaglyph format
171Å from STEREO A satellite. Image Credit: NASA/JPL-Caltech/NRL/GSFC
copyright © by P-M Hedén clearskies@bostream.nu (permission has been granted to kiwizone to use this image)
Hedén's Halpha image has been rotated to superimpose on the 171Å STEREO image
P-M Hedén is a Swedish astrophotographer who is famous for his solar photographs.
Run your mouse on and the off the above image to make it change from Halpha to 171Å
Smoke-stack on the right shows in both images. In this case it is more than a big spicule, but is the beginning of a small CME, as shown in 304Å sequence at this time.
The sun was very active on 20070609, with the solar flare and CME.
See the STEREO mission movie (2D).
See this active region during the previous solar rotation, presented as a STEREO movie.
The sun's rotation period is about 3 weeks at the equator (up to 4 weeks at the poles) and so the sunspot showed up on the 050707 image sequence.