The Evolving Universe

Our Solar System
Our Galaxy
A Universe of Galaxies
The Big Bang
Behind the Science
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A view of our Galaxy from above

Cassiopeia A Supernova Remnant
Galactic Center region

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... and from the side ...

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Cassiopeia A Supernova Remnant
Galactic Center region

Behind the Science:
What is a Galaxy?

Our Galaxy: The Milky Way

A Star is Born
The Life of a Star
Star Death
Our Galaxy

The Evolving Universe is a joint project of the Smithsonian National Museum of Natural History and the Smithsonian Astrophysical Observatory

© 2011 Smithsonian Institution
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Background image credit: NASA/CXC/UMass/D. Wang et al.