Filaments
When unexpected clear skies appeared early in the morning on June 30th I hurried to set up my solar telescope. It had been six weeks since I last imaged the Sun. With no wind, and temperature near 80 degrees, conditions were relatively pleasant. Good observing conditions are fleeting, however. By the time I was ready to record the first image thin clouds were spreading across the sky. During the next hour clouds thickened and I struggled to capture images through cloud gaps.
The Sun continues its slow journey toward sunspot minimum. On June 30th seven days had passed without any sunspots. The only visible features were a collection of filaments and a few modest prominences. Seeing was good, so the pictures below show nice detail even though many were recorded through thin clouds. The first image is a 28-panel mosaic (reduced to one third of its original size!) showing filaments on an otherwise bland surface. (Click on the images for larger views.)
Next is a closer view of the filament group processed to increase contrast between bright and dark features.
The last image shows a prominence visible on the southeastern limb.
This observing session illustrated, once again, how hard it is to achieve excellent observing conditions. A perfect day would have good seeing, a variety of dramatic features on the Sun, and cloudless skies. June 30th had good seeing, but only relatively bland solar features seen through increasing clouds.
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People say I'm crazy doing what I'm doing
Well they give me all kinds of warnings to save me from ruin
When I say that I'm o.k. well they look at me kind of strange
Surely you're not happy now you no longer play the game
People say I'm lazy dreaming my life away
Well they give me all kinds of advice designed to enlighten me
When I tell them that I'm doing fine watching shadows on the wall
Don't you miss the big time boy you're no longer on the ball
I'm just sitting here watching the wheels go round and round
I really love to watch them roll
No longer riding on the merry-go-round
I just had to let it go
John Lennon
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