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Arches National Park Geology Tour provides an extensive, visually rich description of the geology of Arches, by Deborah Ragland, Ph.D. See our DVD collection.
This image shows some of the cratered terrain of Venus.
Click on image for full size
NASA/JPL

Venus Cratered Terrain

This is an example of the craters of Venus.

Venus seems to have about 900 craters, which is about the same number of craters found on the surface of the Earth. Since we know that the Earth has an active surface, which wipes out craters before too much time goes by, this piece of evidence about Venus suggests that the surface of Venus may be active too.


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Science, Evolution, and Creationism

How did life evolve on Earth? The answer to this question can help us understand our past and prepare for our future. Although evolution provides credible and reliable answers, polls show that many people turn away from science, seeking other explanations with which they are more comfortable....more

What causes a Planet's surface to change?

Over the course of time there are many things which can cause the surface of a planet to change its appearance. winds slowly wear away the surface. weather & water, which cause a planet's surface to be...more

Does Venus Have a Surface in Motion?

Like Mars, there is no continental drift on the surface of Venus. The surface of Venus does not *seem* to have changed or moved in billions of years. Nevertheless, there are a few signs which suggest that...more

Venus Global Geography

This is a map of the surface of Venus (turned sideways!). As can be seen on the map, there is no ocean, but there are highlands and lowlands. Lowlands in the map can be thought of as like the ocean bottom,...more

Alpha Regio

Alpha Regio is the home of Eve Mons, a volcano. ...more

Aphrodite Terra

Aphrodite Terra, the Greek name for the goddess Venus, is about the size of half the continent of Africa, and is to be found along Venus' equator. Aphrodite Terra is different from Ishtar Terra in that,...more

Beta Regio

Beta Regio is an example of a volcanic rise, and is more like an island than a continent. Volcanic rises such as Beta Regio sometimes contain deep troughs. The troughs may be evidence of a surface inmotion....more

Ishtar Terra

Ishtar Terra is one of the two main continents of Venus, and is found near the north pole. Ishtar Terra is about the size of the United States. Ishtar Terra contains the four main mountain ranges of Venus....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