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Young Voices for the Planet DVD in our online store includes 8 films where students speak out and take action on climate change.

ExploraTour - Looking at the World in a Different Light

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This is a picture of the sun taken in visible light by the Big Bear Solar Observatory last summer. Take a good long look. You might as well take advantage of this opportunity, because you cannot look directly at the sun in real life without hurting your eyes very badly.

It looks just like you thought it would doesn't it. Except for those two dark spots right near the middle. Those are sunspots.

The sun was very quiet when this picture was taken. At times there are a lot more sunspots on the surface.

Sunspots are places on the sun where solar "storms" may be developing. Solar "storms" are not storms as you know them. They are places where energy is being stored and may be released explosively.

These sunspots don't look very impressive. But wait until you see them in other types of light.

The two buttons below show the sun on the same day as the picture you have already seen. The first button is a picture of the sun in a type of red light called Hydrogen-Alpha. In this light sunspots can be seen very clearly. The second button is a picture of the sun in xrays. This is light far beyond purple. It is given off by very hot gases high above the visible surface of the sun. In this light, the very hot gases above the sunspots glow brightly.

All of these types of light help scientists understand things that happen on the sun.

Shop Windows to the Universe Science Store!

Our online store includes fun classroom activities for you and your students. Issues of NESTA's quarterly journal, The Earth Scientist are also full of classroom activities on different topics in Earth and space science!

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Traveling Nitrogen Classroom Activity Kit

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ExploraTour - Looking at the World in a Different Light

Look at the bed below the body of the sleeping man. You can still see where he was lying down. The heat from his body warmed up the bed sheets which are now radiating infrared light toward your eyes....more

ExploraTour - Looking at the World in a Different Light

All warm objects (not just people) release infrared light. Warmer objects give off more infrared light. Very hot objects radiate other types of light as well. Click on the picture to see the infrared...more

ExploraTour - Looking at the World in a Different Light

What kinds of light can people see? Our eyes can see visible light. When it passes into our eyes different types of visible light create different sensations that we see as colors. ...more

ExploraTour - Looking at the World in a Different Light

Imagine you found a pair of special glasses that not only gave you telescopic vision but gave you the ability to see all forms of radiant energy. The universe in visible light contains all the familiar...more

ExploraTour - Looking at the World in a Different Light

This is a volcano on the island of Miyake in Japan. It has erupted, sending hot lava and ash into the air, a total of ten times. The time after one eruption until the next occurred was about twenty years...more

ExploraTour - Looking at the World in a Different Light

This is a picture of a galaxy in visible light. A galaxy is a large number of stars, some like our sun, some bigger, some smaller and all moving together through space. This galaxy is called Centaurus...more

ExploraTour - Looking at the World in a Different Light

This is a plant in Gary, Indiana where power is made. We use power to run things like television sets, radios, lights, and microwave ovens. The picture looks very strange because it was taken in infrared....more

Windows to the Universe, a project of the National Earth Science Teachers Association, is sponsored in part is sponsored in part through grants from federal agencies (NASA and NOAA), and partnerships with affiliated organizations, including the American Geophysical Union, the Howard Hughes Medical Institute, the Earth System Information Partnership, the American Meteorological Society, the National Center for Science Education, and TERC. The American Geophysical Union and the American Geosciences Institute are Windows to the Universe Founding Partners. NESTA welcomes new Institutional Affiliates in support of our ongoing programs, as well as collaborations on new projects. Contact NESTA for more information. NASA ESIP NCSE HHMI AGU AGI AMS NOAA