by Rod Pommier
Date and time: 2012-04-21 20:42UT. Location: Pommier Observatory, Portland, OR USA. Telescope: Celestron Compustar C14. Camera: Point Grey Research Flea3 Color. Filter: Hydrogen alpha 1-Angstrom bandpass and 3-inch off axis energy rejection filter, yielding f/51. Seeing conditions: Fair.
Best 300 out of 1194 frames.
A large prominence, left, originating just on our side of the solar limb, shown arching into space and exchanging filaments of plasma with another large prominence originating just beyond the solar limb. Together, they form a larger arching prominence. Over time, I could observe several different filaments and clouds of plasma being exchanged along the course of the arch between the two main prominences.
Solar hydrogen alpha video is usually shot in mono, but I shot and processed this one in color to try to convey the actual visual appearance of prominences through a hydrogen alpha filter. The solar disk image was desaturated and then artificially re-colorized to provide visual contrast between the disk and prominence.