Monday, February 27, 2012
Solar activity continues fairly low at present, but the overall trend is increasing as we approach Solarmax. Originally supposed to happen in 2011, it now appears that it will not happen until 2013. The 2013 Solarmax is supposed to be one of the weakest in modern times.
Prominences are visible on the left limb of the sun. A couple of darker filaments are visible on the disk. Filaments are prominences seen edge on. The image below is processed to show more disk detail:
The lighter spot to the lower right is an area outside of the "sweet spot" of the filter.
Sunday, February 26, 2012
Tonight's conjunction of the moon, Jupiter and Venus was spectacular. In this pic, Jupiter is close to the moon, with Venus towards the bottom of the frame. Note the earthshine on the moon, making the unilluminated part of the lunar disk visible. In country lore, this used to be called, "the old moon in the new moon's arms."
Friday, February 17, 2012
Sunday, February 12, 2012
This is a whole disk H-Alpha image taken today with the PST and a digital SLR. The PST has a "sweet spot" in the filter and detail outside the sweet spot does not show very well, so not all features have been captured. Note the prominences at the bottom of the image and spot group 1416 toward the middle of the disk.