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| ID: | 894 |
| Title: | Astronomy Blog |
| Description: | By 1639, astronomy became his principle interest. In 1641, he built an observatory above his house, which included several excellent instruments. ... |
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| Category: | Blogs: Astronomy |
| Link Owner: | pvastro0712.blogspot.com |
| Added: | November 03, 2007 12:10:04 PM |
| Pagerank: | N/A |
| Hits: | 0 |
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