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Comets
Comets are a very interesting thing. Today you will learn more about them during my presentation.
What is a Comet
A comet is an icy body that releases gas or dust. They are often compared to dirty snowballs, though recent research has led some scientists to call them snowy dirtballs
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Facts
Facts
sometimes comets are referred to as “dirty snowballs” or “cosmic snowballs”.
Comets orbit the Sun in elliptical paths – just like the planets. ...
A comet has four components: a nucleus, a coma, a dust tail and an ion tail.
The nucleus of a comet contains the vast majority of its total mass.
the ion tail of a comet is the result of solar winds that blow the gas particles directly away from the Sun.
A comet’s dust tail is a trail of dust and rocky material that is left behind as it moves along its orbit path.
Comets are believed to originate in one of two regions – the theorized Oort Cloud, or the Kuiper Belt found beyond the orbit of Neptune and the dwarf planet Pluto.
The Oort cloud is an outer region of the Solar System 50,000-150,00
Famous comets
Halley’s Comet. In 1705, while studying the orbits of several known comets, Edmond Halley found that the comet observed in 1531, 1607 and 1682 was one in the same. As a result of Halley’s discovery, the comet was named after him. Halley’s Comet is visible every 75 to 76 years.
Comet Hale-Bopp. Comet Hale-Bopp is best known to most people for the much publicized Californian cult who believed the comet to be a spacecraft. Comet Hale-Bopp was last visible in 1997 and will not be visible again for approximately 2,300 years. It is named after its co-discoverers, Alan Hale and Thomas Bopp.
Comet Shoemaker-Levy 9. Shoemaker-Levy 9, also known as SL 9, was a string of comets that was captured by the gravity of Jupiter and subsequently began an orbit about the planet. The orbit of SL 9 assumed about Jupiter was, however, highly irregular and as a result of this irregularity SL 9 crashed into Jupiter in a brilliant display during the week of July 16, 1994. Shoemake-Levy 9 is named after its discoverers, Gene Shoemaker, Carolyon Shoemaker and David Levy.