Sky Tonight—February 3, Double Cluster of Perseus in northwest
These two open star clusters reside an estimated 7,400 light years away. Each contains 300 to 400 stars.
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These two open star clusters reside an estimated 7,400 light years away. Each contains 300 to 400 stars.
A more modern February myth: Groundhog Day.
The northern sky’s two most prominent sky patterns – the constellation Cassiopeia the Queen and the Big Dipper – both circle around Polaris, the North Star, once a day
As Cassiopeia sets, the Southern Cross rises. For all but the southernmost parts of the United States, Cassiopeia never sets
From a dark country sky, you will see that Cassiopeia sits atop of the luminous band of stars known as the Milky Way.
Remember, on a dark night, this galaxy looks like a faint smudge of light. Once you have found it, try again with binoculars or your telescope.
Cassiopeia was a queen in ancient Greek mythology. According to legend, she boasted she was more beautiful than the sea nymphs, called the Nereids.
On October evenings, the Big Dipper resides rather low in the northwest sky, and the W or M-shape constellation Cassiopeia the Queen sits on her throne in the upper northeast…
Thus, Algol is what has been called an “eclipsing variable star.”
Perseus (the Hero) follows Cassiopeia across the night sky.