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The Winter 2010 issue of The Earth Scientist includes a variety of educational resources, ranging from astronomy to glaciers. Check out the other publications and classroom materials in our online store.

Exploratour - Comparing the Surfaces of Earth and Mars

Mars is about 1/3 the size of the Earth, as shown in this drawing.
NASA

This page is the start of the tour which compares the surfaces of Earth and Mars. In this tour we will describe and compare some features of the surfaces of both Earth and Mars. Use the navigation button at the top right of the page to move through the tour. To go to the next page, just press the forward link on the navigation button.

Mars is much smaller than the Earth, with a diameter 53% as large as Earth and a mass of about 11% that of our planet. It has no oceans, trees or other visible forms of life on the surface. We will show in this tour, however, that Mars has many of the biggest things in the solar system - the biggest volcano, the deepest chasm, and the biggest canyon.


Shop Windows to the Universe Science Store!

Our online store includes issues of NESTA's quarterly journal, The Earth Scientist, full of classroom activities on different topics in Earth and space science, ranging from seismology, rocks and minerals, oceanography, and Earth system science to astronomy!

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Cool It! Game

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

Are We From Mars?

A recent study shows there is a possibility that we came from Mars! No, that doesn't mean a spaceship flew here and dropped us off. Rather, scientists say chunks of rock were thrown off the Red Planet...more

ExploraTour - Looking at the World in a Different Light

Even though the sleeping man is no longer on the bed, 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 radiate in the infrared. The warmer the object, the higher the frequency and intensity of the radiation. Very hot objects give off other types of radiation in addition to infrared. Click...more

ExploraTour - Looking at the World in a Different Light

Your eye is a wonderful detector of visible light. Different frequencies of light produce different sensations in the eye which we interpret as colors. Our eyes detect light by using light sensitive components...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

The awesome power of a giant black hole was revealed by looking at this galaxy in three different types of light. The picture that you see is of Centaurus A, a very peculiar galaxy. A galaxy is just a...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