The Search For The Eighth Planet
In 1846, Airy finally persuaded a reluctant Challis to join in the search for an eighth planet in the solar system. Adams had predicted the location of such a planet as early as 1844, based on irregularities in the orbit of Uranus. Adams failed to promote his prediction successfully and there was little enthusiasm for a systematic search of the heavens until Airy's intervention. Challis finally began his, somewhat reluctant, search in July 1846, unaware that Frenchman Urbain Le Verrier had independently made an identical prediction. German astronomer Johann Gottfried Galle, assisted by Heinrich Louis d'Arrest, finally confirmed Le Verrier's prediction on 23 September. The planet was named "Neptune". It soon became apparent from Challis's notebooks that he had observed Neptune twice, a month earlier, failing to make the identification through lack of diligence.
Challis was full of remorse but blamed his neglect on the pressing business of catching up on the backlog of astronomical observations from the observatory. As he reflected in a letter to Airy of 12 October 1846:
I have been greatly mortified to find that my observations would have shewn me the planet in the early part of August if I had only discussed them. ... I delayed doing this ... chiefly because I was making a grand effort to reduce the vast numbers of comet observations which I have accumulated and this occupied the whole of my time.
Read more about this topic: James Challis
Famous quotes containing the words the search, search, eighth and/or planet:
“The struggle alone pleases us, not the victory. We love to see animals fighting, not the victor raving over the vanquished.... It is the same in gambling, and the same in the search for truth.... We never seek things for themselves—what we seek is the very seeking of things.”
—Blaise Pascal (1623–1662)
“Within us, the people of the United States, there is evident a serious and purposeful rekindling of confidence, and I join in the hope that when my time as your President has ended, people might say this about our Nation: That we had remembered the words of Micah and renewed our search for humility, mercy, and justice.”
—Jimmy Carter (James Earl Carter, Jr.)
“He seems like an average type of man. He’s not, like smart. I’m not trying to rag on him or anything. But he has the same mentality I have—and I’m in the eighth grade.”
—Vanessa Martinez (b. c. 1978)
“ET phone home.”
—Melissa Mathison, U.S. screenwriter, and Steven Spielberg. ET, ET The Extra-Terrestrial, realizing he can contact his home planet (1982)