StarDate: March/April 2012

Scaling the Universe
Henrietta Swan Leavitt’s studies of variable stars in the Small Magellanic Cloud

Celebrate the centennial of a discovery that revolutionized how astronomers measure cosmic distance. Delve into a new mission that will bring the high-energy X-ray sky into sharp focus. And find out how joining an astronomy club can enhance your skywatching fun and skills.

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