two suns?

Weeks after a story shot across the Web claiming that the imminent explosion of a nearby star would result in the appearance of a second sun in the sky — a story that was later debunked — two suns were caught on camera yesterday in China. The suns — one fuzzy and orange, the other a crisp yellow orb — appeared side-by-side, one slightly higher than the other.

Previous sightings of horizontally-aligned double images of the sun and moon are recorded in a book called "Light and Color in the Outdoors" (English edition: Springer 1993) by the famous Flemish astronomer Marcel Minnaert, which remains the most complete reference on double suns. "So many other instances have been reported that there is no longer any doubt about ... observations of sun and mock sun(s) being at exactly the same altitude," Minnaert wrote.


Just what is it? An optical illusion? A practical joke? Or has Betelgeuse, the bright star in the constellation Orion, gone supernova, dooming us all? (That rumor made its way around the Web in January and had a lot of astronomers hurrying to calm people.)


"Many photographs are sent to me each year that look like the China sighting," said Les Cowley, who runs a British website called Atmospheric Optics. "Some have more than two suns. They are almost invariably artifacts, the result of shooting through windows or using plane filters on the camera." 


"In brief," he said, "it is almost certainly a reflection owing to shooting through a window."

[7/27/12 - Roy mentioned this to me today and I looked it up]