LOT Old Heritage Auctions  /  2008 Feb Grand Format Book & Manuscript #682  / 

56322

AstronomerJohann Franz Encke ADS

Currency:USD Category:Collectibles Start Price:195.00 USD Estimated At:400.00 - 800.00 USD
AstronomerJohann Franz Encke ADS
<B>Johann Franz Encke Autograph Document Signed</B></I> "<I>J.F. Encke Prof.</B></I>" in Latin, one page, 6.5" x 3.75". His signature is incorporated in the title at top, "<I>Commilitonibus honoratissinies/J.F. Encke Prof.</B></I>" Not translated but what Encke has written is related to astronomy, mentioning stars, Moon, Mars, Venus, and Jupiter. Johann Franz Encke (1791-1865) learned Latin while he was a student at the College at Hamburg, the Johanneum. Working at the observatory of Seeberg near Gotha, he discovered the orbit of a new comet which bears his name; he became director of the observatory in 1822. In 1835, Encke was appointed the first director of the observatory in Berlin. Two years later, he discovered a gap within a ring of Saturn now called the Encke gap. In 1851, Encke determined a new method of calculating planetary perturbations by means of rectangular coordinates. Four tiny holes in blank perimeter. Fine condition.<BR><BR><b>Shipping:</b> Flat Material, Small (<a target="_blank" href="http://www.heritageauctions.com/common/shipping.php">view shipping information</a>)
Sign In to Bookmark Lot