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March/April 2007

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On the Cover: This stony-iron meteorite found in Australia is called a pallasite. The light-colored areas are an alloy of iron and nickel. The glassy orange inclusions are the gemstone peridot.

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March/April 2007

2008 Sky AlmanacA Planet is a Planet is a Planet ... or is It?
The debate over what makes a planet, well, a planet is nothing new - and Pluto wasn't the first object to stir up controversy.

Running with Rockhounds
The quest to touch and own rocks from space spurs meteorite collectors the world over.

In Future Issues
Our May/June issue will bring you feature-length excerpts from some of the latest books in astronomy -- from planetary science to cosmology -- to help you plan your summer reading.

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