This is a rare meteorological phenomenon called a skypunch. When people see these, they think it's the end of the world. Ice crystals form above the high-altitude cirro-cumulo-stratus clouds, then fall downward, punching a hole in the cloud cover.
The Clearest Image of a Sunspot Ever Taken, Courtesy of the Big Bear Solar Observatory
The Cone Nebula
It was a busy morning, about 8:30, when an elderly gentleman in his 80′s arrived at the hospital to have stitches removed from his thumb. He said he was in a hurry as he had an appointment at 9:00 am. The nurse took his vital signs and had him take a seat, knowing it would be over an hour before someone would be able to see him. I saw him looking at his watch and decided, since I was not busy with another patient, I would evaluate his wound. On exam, it was well healed, so I talked to one of ...