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Why are some stars always visible while others come and go with the seasons?

  • Written by Vahe Peroomian, Professor of Physics and Astronomy, USC Dornsife College of Letters, Arts and Sciences
Why are some stars always visible while others come and go with the seasons?Stars near the north celestial pole circle the North Star, Polaris. Photographed in the Eastern Sierra Nevada, Calif. Vahé Peroomian

As a space scientist, every time I go outside with my family, I tell my children to look up at the sky. The front door of our home looks southeast, and on winter nights the constellation Orion hangs...

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