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Start Over Subjects Astronomy ✖Remove constraint Subjects: Astronomy Titles The parallax of [alpha] lyrae and 61 cygni: by Asaph Hall, John Rodgers ✖Remove constraint Titles: The parallax of [alpha] lyrae and 61 cygni: by Asaph Hall, John Rodgers Languages English ✖Remove constraint Languages: English Copyright Public domain ✖Remove constraint Copyright: Public domain

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  • The parallax of [alpha] lyrae and 61 cygni: by Asaph Hall, John Rodgers1