JUPITER AT OPPOSITION: Tonight, Dec. 2-3, Jupiter is at opposition--that is, directly opposite the sun. It rises at sunset and soars overhead at midnight. There is no better time to look at the giant planet, because this is the closest opposition of Jupiter until the year 2021. [more]
THE SCALE OF AMAZING: A slow but dense solar wind stream is buffeting Earth's magnetic field, igniting bright auroras around parts of the Arctic Circle. "Wow!" says Fredrik Broms of Kvaløya, Norway. "On the scale of amazing, the sky went from 0 to 100 in only five minutes." He took this picture on Dec. 1st:
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"The sky has been clear for several days without a trace of any auroras here in the north, but tonight all this changed in an instant," he adds. "I witnessed one of the most powerful coronas in a long while with an exceptionally distinct band of purple-pink from excited nitrogen molecules at the lower edge. A wonderful start of December!"