Regina G. Barber talks to Sarafina about three winter constellations, and journey through the life cycle of a star. Curious about the night sky?

This summer, scientists have their eyes and telescopes trained on the small constellation system T Coronae Borealis. They think it will explode as part of a periodic nova — a once-in-a-lifetime ...

The star was at the end of its life cycle when it profusely produced and expelled dust into space more than 4.6 billion years ago.