Cooper witnessed a circumhorizontal
arc--a rainbow-colored band of light caused by the sun shining
through plate-shaped ice crystals in cirrus clouds. They are a phenomenon
of spring and summer, forming only when the sun is more than 58
degrees above the horizon. As the name suggests, these arcs tend
to hug the horizon, showing themselves most often over flat, sunny
places like desert golf courses.
Look Fore! them, the next time you're on the green.
22 DAYS AND COUNTING: The sun has been blank for 22 days in a
row. That seems like a long time, but it's not even close to the
100-year record set in 1913 when the sun was spotless for 92 consecutive
days. Can the deep
solar minimum of 2009 produce a new record? Check back in 70
days for the answer.
AURORA WATCH: High-latitude sky watchers should be alert for auroras. A solar
wind stream is buffeting Earth's magnetic field and causing geomagnetic
activity around the poles. Sylvain Serre sends this picture from
just outside the village of Salluit in Nunavik, Canada:

Photo details: Canon
EOS 30D, 800 ISO, 15 sec
https://spaceweather.com/