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 5/10 Good --- rss.clipmarks.com http://rss.clipmarks.com/clipper/skwirlinator
| Clip, tag and save information that's important to you. Bookmarks save entire pages...Clipmarks save the specific content that matters to you! ... |
Saturday, April 05, 2008 --- 111 days ago http://clipmarks.com/clipmark/27F781A0-A8C5-4380-AE75-37A920CB4716/
| clipped by: skwirlinator Clip Source: www.redorbit.com Clip Source: www.redorbit.com Recycling Cassiopeia A For billions of years, massive stars in our Milky Way Galaxy have lived spectacular lives. Collapsing from vast cosmic clouds, their nuclear furnaces ignite and create heavy elements in their cores. After a few million years, the enriched material is blasted back into interstellar space where star formation begins anew. The expanding debris cloud known as Cassiopeia A is an example of this final phase of the stellar life cycle. Light from the explosion which created this supernova remnant was probably first seen in planet Earth's sky just over 300 years ago, although it took that light more than 10,000 years to reach us. In this gorgeous Hubble Space Telescope image of cooling filaments and knots in the Cas A remnant, light from specific elements has been color coded to help astronomers understand the recycling of our galaxy's star stuff. Tags: cassiopeia a , space , supernova remnant , big boom ha ha ... |
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