Comets, Asteroids, and Meteors I Differences

The objective of this video is to compare and contrast comets, asteroids, and meteors ORIGIN *Most comets are originated from Kuiper Belt and Oort Cloud. The Kuiper belt is a doughnut-shaped ring of icy objects around the Sun, extending beyond the orbit of Neptune While the Oort cloud is a spherical cloud of cometary bodies far beyond the orbits of the outermost planets. Comets usually come from the Oort Cloud and a few from Kuiper Belt. *The origin of most asteroids is the main asteroid belt. The main asteroid belt is a torus-shaped region of rocky bodies between the orbits of Jupiter and Mars. This belt is theorized by the scientist to be the remnants of a planet that did not form completely. SHAPES Comets and asteroids have varied and irregular shapes. SIZE RANGE OF DIAMETER (KILOMETER) *The sizes of comets are ranging from 1 km up to about 20 km while the asteroids are from 1 km up to 1000 km. The asteroid is tremendously bigger than a comet. Thus, the asteroid is usually bigger than a comet. CHEMICAL COMPOSITION *Comets are icy objects while asteroids are rocky fragments in outer space. Specifically, comets are composed of ice which is a frozen water, Gases which are frozen ammonia, methane, and carbon dioxide, and other organic compounds or carbon containing compounds. Comets are also known as dirty snowballs. Because of its composition, the comet has nucleus, coma, Plasma/Ion tail, and dust tail. On the other hand, the asteroids or rocky fragments contain silicates which are olivine, pyroxene, iron, and nickel Comets and asteroids both reflect light from the Sun in varying amounts depending on the size and composition. The presence of more silicates allows a comets and asteroids to reflect light. Silicates are minerals that contain the elements silicon, oxygen, and at least one metal. If the comets and asteroids have smaller amounts of silicates, it would be more difficult to see even with the use of a telescope. ORBIT *The orbit of comets is highly elliptical while the orbit of the asteroids is more rounded. Comets and asteroids both orbit around the Sun and move relatively slow when viewed from earth. This means that we can see a comet for up to a year in the night sky or even during the morning if the comet is bright enough. ORBITAL PERIOD IN YEARS *The orbital periods of comets are ranging from 75 years to 250,000 years. Since most of the comets are originated from Kuiper belt and oort cloud which are beyond the solar system, they orbited around the sun for many years. In contrast, the orbital periods of asteroids are ranging from 1 year to 100 years. This is because the origin of most asteroids is main asteroid belt which is just between the orbits of Mars and Jupiter. Another outer space objects are meteoroids. Meteoroids are a broken rock and dust from either comets, asteroids, the moon, or Mars. they can be small as a grain of sand to around 10 meters in diameter. When the meteoroid enters the earth's atmosphere, it is called a meteor. When it survives and makes it to the ground, it is called a meteorite. Email Address: [email protected] Facebook: https://web.facebook.com/winterjoedelyncruz/ Twitter: https://twitter.com/joedelynw TAGS: Comparison and contrast of Comets Asteroids and Meteors Comets Asteroids Meteors Comets Asteroids and Meteors Comets Asteroids and Meteors Grade 8 Science Comets and Asteroids Comets in Space Asteroids Comets and Meteors Difference between Comets and Asteroids Meteors Asteroids and Comets Meteors Falling NEO Near-Earth Objects Near-Earth Objects (NEO) Comet Halley Comet Hale-Bopp Comet Hyakutake Meteoroids Meteors Meteorite Kuiper Belt Oort Cloud Asteroid Belt

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