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Title | Author(s) | Issue Date | |
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The Helix nebula revisited-a planetary nebula the size of the Moon Journal:Anglo-Australian Observatory Epping Newsletter | 1-Jul-2001 |
Title | Author(s) | Issue Date | |
---|---|---|---|
The Helix nebula revisited-a planetary nebula the size of the Moon Journal:Anglo-Australian Observatory Epping Newsletter | 1-Jul-2001 |