

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
A 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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