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March/April 2006

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On the Cover: Hundreds of thousands of stars crowd the center of the Milky Way galaxy in this recent infrared image from Spitzer Space Telescope. A supermassive black hole inhabits the center of the galaxy, with billowing clouds of gas and dust stretching across hundreds of light-years. The image spans 640 light-years from top to bottom.

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March/April 2006 

2006 Sky AlmanacNo Trip Around the Block
What kinds of hazards will future astronauts face as they journey to the Red Planet, and what is NASA planning to do about them?

Heaven on Earth
Most of our studies of the heavens, by nature, are done from afar. But did you know that some objects on Earth can tell us about the Sun and stars? And itís more than just meteorites.

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