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Science, Evolution, and Creationism, by the National Academies, focuses on teaching evolution in today's classrooms. Check out the other publications in our online store.
This is an image of the surface of Io, looking down on a volcano and the lava plain surrounding it.
Click on image for full size
NASA

Surface of Io

Unlike the other moons of Jupiter, Io is not made of ice. In fact, the surface of Io is rocky with many volcanoes. The volcanoes pour out lava of sulfur from the inside of Io.

The surface of Io can be cold enough for frost, however. White patches in the image indicate areas of frost on the surface.

The biggest volcanos of Io are called Loki and Prometheus. Between the volcanos are lava plains, much like those found in Hawaii near a volcano.

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Amalthea was discovered by E Barnard in 1872. Of the 17 moons it is the 3rd closest to Jupiter. Amalthea is about the size of a county or small state. Amalthea is named after the goat in Greek mythology...more

Callisto

Callisto was first discovered by Galileo in 1610. It is the 2nd largest moon in the solar system, and is larger than the Earth's moon. It is about as big as the distance across the United States. Callisto...more

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Europa

Europa was first discovered by Galileo in 1610, making it one of the Galilean Satellites. It is Jupiter's 4th largest moon, 670,900 km ( miles) from Jupiter. Europa's diameter is about half the distance...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