8th grade ch. 3 sec. 5 comets, asteroids and meteors

Sec. 5 Comets, Asteroids, & Sec. 5 Comets, Asteroids, & MeteorsMeteors

YouTube video-Bill Nye Comets & Meteors song

comet

“dirty snowball”

chunk of ice & dust

orbits- long narrow

ellipse

Parts of a comet

coma nucleus tail

outer layer inner layerformed by solar

wind pushing gasaway from the sun

tail

nucleus coma

Most comets- found in Kuiper belt (between Neptune & Pluto) or Oort cloud (beyond Pluto)

cometcomet

Pigpen from “Peanuts”

Interactive Comet Animation

Comet Hale-Bopp in 1997

The passage of Hale-Bopp was notable for inciting a degree of panic about comets not seen for decades. Rumors that the comet was being followed by an alien spacecraft inspired a mass suicide among followers of the Heaven's Gate cult.

Comet Halley was visible in 1910 Comet Halley was visible in 1910 and again in 1986. The next time and again in 1986. The next time it will be visible will be in early it will be visible will be in early 2062.2062.

AsteroidsAsteroids

Too small & too Too small & too numerous to be numerous to be considered full fledged considered full fledged planetsplanets

Most revolve around Sun Most revolve around Sun between orbits of Mars & between orbits of Mars & Jupiter= asteroid beltJupiter= asteroid belt

the the asteroidasteroid IdaIda and its newly- and its newly-discovered moon, discovered moon, DactylDactyl

Asteroid beltAsteroid belt

asteroidsasteroids

meteoroidmeteoroid meteor meteor meteorite meteorite

meteor showermeteor shower

meteormeteor

meteoritemeteorite

A shooting star is really a meteor.A shooting star is really a meteor.

comacomaouter layer of a comet

““dirty snowball”dirty snowball”Nickname for a comet

nucleusnucleusInner layer of a comet

tailtailFormed by solar wind pushing gas away from the Sun

elliptical (ellipse)elliptical (ellipse)The shape of a comet’s orbit around the Sun

meteormeteorA shooting star is really a ________.

asteroidsasteroids

Too small & too numerous to be Too small & too numerous to be considered full fledged planetsconsidered full fledged planets

meteoritemeteoritechunk of rock that lands chunk of rock that lands

on Earth’s surfaceon Earth’s surface

meteoroidmeteoroidchunk of rock or dust chunk of rock or dust in spacein space

Comets or asteroidsComets or asteroidsMeteoroids usually come Meteoroids usually come

from________ or ___________.from________ or ___________.

frictionfriction

causes meteoroids to burn causes meteoroids to burn up in the atmosphereup in the atmosphere

Halley’s CometHalley’s CometThe comet that is The comet that is

observed from Earth every observed from Earth every 76 years76 years