Introduction to Oort Cloud

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  • Topic: Comet, Oort cloud, Planet
  • Pages : 3 (1101 words )
  • Download(s) : 169
  • Published : November 9, 2012
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Anita Abnous
Instructor Robert Cannon
Speech 101
10/23/12

Defining ‘how big is the Solar System’ is the fodder of an ongoing debate among scientists. As humans, we like definitive answers and sure quantitative numbers to bandy about when we talk about anything. Today I am going to talk about some facts about Oort cloud. What is it? Where is it? How it gets started? Oort cloud Facts:

-The Oort cloud is the farthest from the Sun that you can go and still be in the Solar System. -It is believed that most comets originate in the Oort cloud before "falling" toward the Sun. What is the Oort cloud?

Scientists think that there is a group of rocks and ice that forms a cloud-like region surrounding our Solar System. It is a collection of comet like objects orbiting far away from the Sun. It is named after a Dutch astronomer Jan Oort who refined and popularized the theory. Regarding to a book named In Quest of the Solar System by Theo Koupelis Jan Oort, in 1927, this Dutch astronomer proved by observation (in the Leiden observatory) that our galaxy is rotating and calculated the distance of the sun from the centre of the galaxy and the period of its orbit. In 1950 he suggested the existence of a sphere of incipient cemetery material surrounding the solar system, which is now called the 'Oort cloud. Although its existence has not yet been proven through direct observation, the reality of the Oort cloud is widely accepted in the scientific community. He proposed that comets detached themselves from this 'Oort-cloud' and went into orbit around the sun. From 1940 he carried out notable work in radio astronomy. The Oort cloud is filled with icy objects composed of ammonia, water and methane. Another astronomer Professor John Matese, of the University of Louisiana at Lafayette, said most comets come from the same part of the Oort cloud. Dust that orbit the sun in the most distant region of the solar system called the Oort cloud. When a comet (“dirty snowballs” or “icy...
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