U.S. Naval Observatory: Asaph Hall's journal

Posted by David Eicher
on Friday, May 02, 2014

By David J. Eicher

A beautifully prepared replica of the in-house original journal of Asaph Hall’s, describing the discovery of martian moons Phobos and Deimos, U.S. Naval Observatory, Washington, D.C., April 28, 2014.

Related blog: Behind the scenes at the U.S. Naval Observatory

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