FACTOID # 14: North Carolina has a larger Native American population than North Dakota, South Dakota and Montana combined.
 
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Encyclopedia > James Christy

James Walter Christy (born 1938) is an American astronomer.


Working at the United States Naval Observatory, he discovered in 1978 that Pluto had a moon, which he named Charon.


The discovery was made by carefully examining and screwing an enlargement of a photographic plate of Pluto and noticing it had a very slight bulge on one side. By examining images taken over several successive days, he was able to convince himself that it was a moon. The photographic evidence was considered convincing but not conclusive; however, based on the orbit determined, a series of mutual eclipses of Pluto and Charon was predicted and observed, which provided confirmation.


In more modern telescopes, such as the Hubble Space Telescope or ground-based telescopes using adaptive optics, separate images of Pluto and Charon can very easily be resolved.


  Results from FactBites:
 
Christie's - Wikipedia, the free encyclopedia (212 words)
Christie's quickly established a reputation for conducting some the greatest auctions of the 18th and 19th centuries.
In 1998, Christie's in New York sold the famous Archimedes Palimpsest after the conclusion of a lawsuit in which its ownership was disputed.
Christie's has two salerooms in the United States, one in New York and one in Los Angeles.
mmf - mmfg06 - Generated by Personal Ancestral File (550 words)
James IZATT was born 16 Jun 1871 in, Dunfermline, Fife, Scotland.
James Christie GILLIES was born 24 Mar 1873 in, Auchterderran, Fife, Scotland.
James GILLIES was born 1877 in, Kirk of Beath, Fife, Scotland.
  More results at FactBites »

 
 

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