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The Stars Behind Our Stellar Classification System

Author Dava Sobel explains how a group of women astronomers helped develop the classification system that scientists use to identify stars today.

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Cool As Ice

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Spotlights

Educational Resource

Illuminating Luminescence

In this activity, students will compare and contrast different forms of luminescence by observing how chemiluminescence, phosphorescence, and fluorescence produce or emit light. Students will also compare these forms of luminescence to bioluminescence.

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Educational Resource

How Boulders Are Born

In this activity, students will review and discuss weathering, erosion and mass wasting, to gain a stronger understanding of how Hickory Run’s Boulder Field was formed after the Laurentide Continental Glacier receded. Using edible materials, students will model and demonstrate the geological processes that formed this unique feature.

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Educational Resource

Make a Chemical Clock

In this activity, students will perform three experiments using household ingredients to observe and record color changes, indicators that a chemical reaction has taken place. Students also will observe a chemical clock reaction and explore how reaction times can be sped up or slowed down.

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Educational Resource

Lilliputian Landscaping

In this activity, students will examine the different materials gardeners add to their soil, and discuss how these materials are important for plant growth. They will learn how to build a sustainable terrarium by adding a waterbed, mixing their own soil and transplanting a small plant into their terrarium.

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Educational Resource

Lighting Up Celery Stalks

In this activity, students will conduct a series of hands-on experiments that will demonstrate how the working of these veins, known as capillary action, enables water to travel throughout the length of a plant. Students will learn how the forces of water cohesion and adhesion contribute to the process of capillary action.

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Educational Resource

Cooking with Chemistry

Chef Wylie Dufresne, the owner of New York City restaurant wd~50, experiments with food, literally. He has lab notebooks detailing what certain chemicals do to certain dishes. One of his signature dishes is a spin on eggs Benedict: he found that creating the plate's centerpiece--a cube of fried hollandaise sauce--required a lot of scientific testing. Science Friday stopped in at Dufresne's kitchen to see how he prepares the dish.

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Educational Resource

Best Bubbles

Astronauts are allowed to bring special “crew preference” items when they go up in space. NASA astronaut Don Pettit chose candy corn for his five and a half month stint aboard the International Space Station. But these candy corn were more than a snack; Pettit used them for experimentation.

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