Scientists believe asteroids may have caused the extinction of the dinosaursĪsteroids move in very elliptical orbits The largest are Pallas, Juno & Vesta *Ceres was once called an asteroid, but is now a dwarf planet!ġ4 Meteoroids Where do meteors come from?ġ5 Size of meteoroids Smaller than the comets or asteroids from which they come (since they are broken pieces of these!) The Perseid Meteor Shower (happens every August) which has been observed for 2000 years! What are asteroids made of? Rocky objects left over from the formation of the solar system “Asteroid Belt” between orbits of Mars & Jupiterġ0 Size of Asteroids From 300km in diameter “Dirty Snowballs” Comet means “Long-haired star”Ĭomets orbit in long, narrow, elliptical paths around the Sun.ĩ Asteroids Where do asteroids come from? Origin: Left over from formation of solar system Kuiper Belt & Oort Cloudģ Size of Comets About the size of a mountain (w/out the tail)Ĥ Composition of Comets Ice Dust Small rocky particlesĬORE: Nucleus – solid inner core Coma – cloud of dust & gas Tail – gas & dust can been seen as the sun heats the comet & blows it away from the sunĦ Comet’s tail ALWAYS points away from the Sun as the solar winds blow the tail awayĪ.K.A. When meteoroids enter the Earth's atmosphere they begin to burn up. What are the characteristics of comets, asteroids, and meteors? How are they alike/different?Ģ Comets Where do they come from? ORIGIN: Meteoroids, Meteors, & Meteorites When the rock we refer to as a meteor is still in space, it is called a meteoroid.
Compare and contrast comets, asteroids, and meteors Compare and contrast asteroids and comets. Compare and contrast comets, asteroids, and meteors"- Presentation transcript:ġ S6E1.f.
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