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M51 in 60 Seconds (03-18-2008)
Hubble's image of M51, also known as the Whirlpool Galaxy, shows the majestic spiral arms that are actually long lanes of stars and gas laced with dust. The infrared image from Spitzer also reveals stars and the glow from clouds of interstellar dust.

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- Related Links:
--  Animations & Video
--  Whirlpool Galaxy (M51)

Cassiopeia A in 60 Seconds (02-11-2008)
Cassiopeia A is the 300-year-old remnant created by the supernova explosion of a massive star. Each Great Observatory image highlights different characteristics of the remnant.

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--  Cassiopeia A
--  Cassiopeia A in Many Colors

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