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Cecilia Helena Payne-Gaposchkin

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Payne-Gaposchkin, Cecilia Helena (1900-1979) was a British-born astronomer who became an authority on variable stars (stars that change in brightness) and the structure of the Milky Way Galaxy.

Planetarium

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Planetarium, is an educational device for showing the locations and movements of the planets and other objects in the universe.

How Reservation Confirmations Work

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Automated reservation confirmations have become an important link. Find out how these simple electronic notifications can save you time.

Lake and River Activities

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Lake and river activities let kids explore local aquatic life. Learn about aquatic plants and animals with these lake and river activities for kids.

Infectious Diseases 101

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Infectious diseases are caused by microorganisms, and your body is constantly dealing with them. Learn more about infectious diseases and how to prevent them.

Should you pay down your mortgage as fast as you can?

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Should you pay down your mortgage as fast as you can? Find out if you should pay down you mortgage as fast as you can by HowStuffWorks.com.

Do anti-aging lights really work?

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Do anti-aging lights really work? Visit Discovery Fit & Health to learn about anti-aging lights and if they really work.

5 Profound Insights From Lao-tzu, Founder of Taoism

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Lao-tzu was the legendary Taoist philosopher whose words sound profoundly modern. They help us maintain a sense of harmony and balance in an often-chaotic world.

Why Do We Have Leap Years?

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Leap years only come around once every four years. So, why are they so rare and who decided we need them anyway?

Man-made Islands Are More Common Than You Think

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Man has been building islands all over the world for centuries using extraordinary feats of engineering. But at what cost to the environment?

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