The sun shows only few spots when near solar minimum. Today the Spots AR2629 and 2628 were clearly visible.
Today the tiny disc of mercury crossed in front of the sun. The weather didn’t cooperate fully, and I had to switch mounts as the Meade randomly stopped tracking in RA, and the WiFi router for the roof didn’t work as expected and tested… but I was still able to get some decent images… Read More
Today I was making sure everything is in working order for Monday’s transit of Mercury across the sun.
I was able to fix the issue of the declination runaway motor of our club’s LXD-650 mount, and took some images using the 127mm refractor with a 1,4x teleconverter.
On Monday, 9th of May will be another transit of Mercury across the sun, here are some pictures from May 7th 2003:
Early morning May 7th some amateur astronomers in Vorarlberg packed their gear to observe the Mercury transit from the Bödele above Dornbirn. We had some beautiful weather, and while there were few visitors, TV and Radio came and kept us busy with interviews.
Today I tried to capture a transit of the ISS across the disc of the sun, but somehow I missed it, even though I started my series of exposures according to a GPS clock. So the only result I can show is the face of the quiet sun, with only small sunspots littered across. Read More
The sky was beautifully clear today, so I decided to try out the QHY5-II camera on the sun:
Most people don’ t realize that the bright spots below a tree in the grass are actually images of the sun formed by small holes created through overlapping leaves in the tree’s branches. Because the sun is a sphere, the images are also circular (depending of the angle of the surface).
A similar situation occurs when the sun shines through the small holes in blinds – round images of the sun are projected against the foor or wall. The images become interesting when the sun’s disk is obscured by something, e.g. the moon during a solar eclipse or trees when the sun is rising or setting on a wooded horizon. Read More