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Cecilia Payne and the Composition of the Stars Article for grades 9 through 12 What are the stars made of? At 25, Cecilia Payne answered this fundamental question in her Ph.D. thesis. Her pioneering work also made it possible to read a star's surface temperature. |
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Ernst Chladni and Rocks from the Sky Article for grades 9 through 12 Today, we accept the notion that enormous rocks exist within our solar system and that some of them fall to Earth. A little over 200 years ago, though, this idea garnered skepticism and ridicule. |
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Friedrich Bessel and the Companion of Sirius Article for grades 9 through 12 Bessel discovered Sirius' unseen companion star long before technology allowed us to see Sirius B and even longer before quantum mechanics explained the nature of white dwarfs. |
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Galactic Census Curriculum Materials for grades 9 through 12 How many stars are there in our galaxy? How common are globular star clusters? How in the world would you go about finding answers to these questions? Learn the techniques astronomers use. |
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Gravity: It's Universal Article for grades 9 through 12 We owe our lives to gravity. It holds the atmosphere to Earth and keeps us all from falling off into space. Not to mention that without gravity, the stars and planets—including Earth—wouldn't even exist! |
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| PDF [plugins: Adobe Acrobat; filesize: 196kb] [pages: 9] More about this Resource |
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Gravity: Making Waves Article for grades 9 through 12 Gravity is anything but elementary. Explore the ongoing investigation of gravity, and meet astrophysicists struggling to capture its most elusive hallmark: the gravitational wave. |
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How the Sun Works Activity for grades 9 through 12 Talk about a long-term power source. For billions and billions of years, the Sun has been giving off energy that equals 4 x 1026 watts. What keeps the Sun burning so bright? |
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Olber's Paradox: Why Is The Sky Dark at Night? Article for grades 9 through 12 In the midst of a forest, all you can see is a wall of tree trunks. So why, then, don't we see a wall of starlight when we look up at the forest of stars in the night sky? |
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