Shop Windows to the Universe

We now offer the Cool It! card game in our Science Store. Cool It! is the new card game from UCS that teaches kids about the choices we have when it comes to climate change.

ExploraTour: A Peek into the Lives of the Stars

About 4 and a half billions years ago something interesting happened in space. The sun turned on at the center of a cloud of gas and dust. The rest is history.

We now know that the sun and other stars are born in dust clouds deep in outer space. As they get older they get redder and swell to many times their original size. Finally they end in incredible explosions that leave behind very strange objects.

And that is not all. Most atoms, the tiny particles that make up everything on Earth, including you, are made in stars and in the explosion of stars.

How about that . . . you are from outer space after all!

Click ahead to find out more.

Shop Windows to the Universe Science Store!

Our online store includes books on science education, ranging from evolution, classroom research, and the need for science and math literacy!

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Traveling Nitrogen Classroom Activity Kit

Check out our online store - minerals, fossils, books, activities, jewelry, and household items!...more

Starspots

Did you know that the Sun has spots? They are called sunspots. Other stars have spots too. They are called starspots. Both sunspots and starspots are cool spots (well, colder than the bright areas around...more

The Oldest Light in the Universe

NASA scientists have taken a "snapshot" picture of the oldest light in the universe. The picture shows what is left of light given off during the big bang. The light is over 13 billion years...more

Element (Chemical Element)

An element (also called a "chemical element") is a substance made up entirely of atoms having the same atomic number; that is, all of the atoms have the same number of protons. Hydrogen, helium, oxygen,...more

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

Windows to the Universe, a project of the National Earth Science Teachers Association, is sponsored in part by the National Science Foundation and NASA, our Founding Partners (the American Geophysical Union and American Geosciences Institute) as well as through Institutional, Contributing, and Affiliate Partners, individual memberships and generous donors. Thank you for your support! NASA AGU AGI NSF