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'''Karl Rudolph Powalky''' (19 June 1817 – 11 July 1881) was a German astronomer known for his work on estimating the solar parallax at 8.83 arcseconds.
Nothing is known of Powalky's younger days except that he was born in [[Neudietendorf]], Thuringia. He worked at the Hamburg observatory from 1842 to 1847 and worked as a computer for [[Peter Andreas Hansen]] from 1850 to 1856. He moved to the United States in 1873 working in a naval observatory in Washington where his death was recorded. His achievement was in the calculation of the solar parallax of 8.83 arcseconds based on observations made during a transit of Venus in 1769<ref></ref> resulting in an estimate of the [[astronomical unit]] (AU) which is the mean distance of the Sun from the Earth.<ref></ref> He is buried at [[Prospect Hill Cemetery (Washington, D.C.)]].
== References ==
[[Category:1817 births]]
[[Category:1881 deaths]]
[[Category:German astronomers]]
Nothing is known of Powalky's younger days except that he was born in [[Neudietendorf]], Thuringia. He worked at the Hamburg observatory from 1842 to 1847 and worked as a computer for [[Peter Andreas Hansen]] from 1850 to 1856. He moved to the United States in 1873 working in a naval observatory in Washington where his death was recorded. His achievement was in the calculation of the solar parallax of 8.83 arcseconds based on observations made during a transit of Venus in 1769<ref></ref> resulting in an estimate of the [[astronomical unit]] (AU) which is the mean distance of the Sun from the Earth.<ref></ref> He is buried at [[Prospect Hill Cemetery (Washington, D.C.)]].
== References ==
[[Category:1817 births]]
[[Category:1881 deaths]]
[[Category:German astronomers]]
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