Last Wednesday in Stockholm, Sweden, the sun was only up for a little while, but it made good use of its time. Sunbeams lanced through ice crystals in the air, producing a busy halo of surpassing beauty:

© Peter Rosén
"This was the most spectacular sun halo I have seen in recent years from Stockholm," says photographer Peter Rosén. "It was visible for the whole (short) day." In addition to the sundogs, upper tangent arc, and 22° halo captured in the snapshot above, Rosén also witnessed "a 46° outer halo and a circumzenithal arc as ice crystals blew in gusts across the sun. What a show!"

Now is the time of year when low-hanging suns shine through high-floating ice to produce such vistas. People of the northern hemisphere should be alert for halos.