We live within the Milky Way galaxy, a flattened disk of hundreds of billions of other stars, but the Milky Way is but one of trillions of galaxies that fill the observable universe. Spitzer’s infrared vision has helped us to more completely understand these immense objects that come in many shapes and sizes.

In the local universe Spitzer has traced out the underlying populations of stars within galaxies that range from cosmic pinwheels to nearly featureless beehives, and mapped the complex patterns of dust that propagate through many of them. 

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