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Barnard's star
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Barnard's star
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Barnard's star
巴纳德星
1916年美国天文学家E.E.巴纳德在蛇夫座发现一颗每年自行10.31″的恒星,星号为BD+4°3561。
Astronomy
Barnard's star
巴纳德星
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