| The American Heritage® Dictionary of the English Language: Fourth Edition. 2000. |
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| Hale, George Ellery |
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| DATES: | 18681938 |
| American astrophysicist who invented the spectroheliograph (1891) and directed the Mount Wilson Observatory (19041923).
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| The American Heritage® Dictionary of the English Language, Fourth Edition. Copyright © 2000 by Houghton Mifflin Company. Published by the Houghton Mifflin Company. All rights reserved. |
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