Chapter 24: Section 4 (Other Objects in our Solar System)

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Unit 7: AstronomyChapter 24: The Solar SystemSection 4: Other Objects in our Solar System

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<ul><li>1.Chapter 24 Section 4:Other Objects in Space</li></ul> <p>2. Chapter 24:Section 4 </p> <ul><li>Comets: </li></ul> <ul><li><ul><li>1.Controlled by a stars gravity </li></ul></li></ul> <ul><li><ul><li>Travel through planets orbits, out of the Solar System, &amp; back in again </li></ul></li></ul> <p>Pgs. 662 - 666 Halleys Comet Hale-Bopp Comet 3. Chapter 24:Section 4 </p> <ul><li>Comets: </li></ul> <ul><li><ul><li>HALLEYS COMET: Most famous (last seen 1986) </li></ul></li></ul> <ul><li><ul><li><ul><li>Returns every 76 years </li></ul></li></ul></li></ul> <ul><li><ul><li><ul><li>Will return in 2062 </li></ul></li></ul></li></ul> <ul><li><ul><li>HALE-BOPP: Most recent comet </li></ul></li></ul> <ul><li><ul><li><ul><li>Discovered in July 23, 1995 </li></ul></li></ul></li></ul> <ul><li><ul><li><ul><li>Visible from Earth during 1997 </li></ul></li></ul></li></ul> <p>Pgs. 662 - 666 Halleys Comet Hale-Bopp Comet 4. Chapter 24:Section 4 </p> <ul><li>Comet Composition:</li></ul> <ul><li><ul><li>Dust, rock, frozen methane, ammonia, and water </li></ul></li></ul> <ul><li><ul><li>Comets normally look like dirty snowballs </li></ul></li></ul> <ul><li><ul><li>When they get close to stars, they change </li></ul></li></ul> <ul><li><ul><li><ul><li>They begin to vaporize &amp; Glow </li></ul></li></ul></li></ul> <ul><li><ul><li><ul><li>Forms a coma (tail) from the nucleus (head) </li></ul></li></ul></li></ul> <ul><li><ul><li><ul><li><ul><li>Coma: glowing trail of particles</li></ul></li></ul></li></ul></li></ul> <ul><li><ul><li><ul><li><ul><li>Always points away from the star </li></ul></li></ul></li></ul></li></ul> <p>5. Chapter 24:Section 4 </p> <ul><li>Comet Composition (contd) </li></ul> <ul><li><ul><li>Comets eventually break up into space debris </li></ul></li></ul> <ul><li><ul><li>Oort Cloud: large collection of comets beyond Pluto </li></ul></li></ul> <p>6. Chapter 24:Section 4 </p> <ul><li>C.Meteoroids: chunks of rock </li></ul> <ul><li><ul><li>Randomly moving through space </li></ul></li></ul> <ul><li><ul><li>Usually leftover comet or asteroid debris </li></ul></li></ul> <p>7. Chapter 24:Section 4 </p> <ul><li>Meteor: Meteoroid that enters Earths atmosphere </li></ul> <ul><li><ul><li>Heat up &amp; begin to glow = shooting star </li></ul></li></ul> <ul><li><ul><li>Most burn up before reaching the surface </li></ul></li></ul> <ul><li><ul><li>Many meteors at one time = meteor shower </li></ul></li></ul> <p>8. Chapter 24:Section 4 </p> <ul><li>Meteorite: Meteor that does not totally burn up, &amp; strikes the Earths surface </li></ul> <ul><li><ul><li>Impact creates a crater </li></ul></li></ul> <p>9. LARGEST METEORITE TO HIT EARTH Namibia, Africa 10. Largest US Meteorite Kansas under 6 feet of earth. 11. Chapter 24:Section 4 </p> <ul><li>F.Asteroids </li></ul> <ul><li><ul><li>Large rocks located between Mars &amp; Jupiter </li></ul></li></ul> <ul><li><ul><li>Asteroid belt: Large orbiting ring of asteroids </li></ul></li></ul> <ul><li><ul><li>Believed to be a planet that never formed </li></ul></li></ul> <p>12. Chapter 24:Section 4 </p> <ul><li><ul><li>Range in size from dust to Moon size </li></ul></li></ul> <ul><li><ul><li>Some Named Asteroids: </li></ul></li></ul> <ul><li><ul><li><ul><li><ul><li>Ceres: 940 km (Largest known) </li></ul></li></ul></li></ul></li></ul> <ul><li><ul><li><ul><li><ul><li>Pallas: 523 km </li></ul></li></ul></li></ul></li></ul> <ul><li><ul><li><ul><li><ul><li>Vesta: 501 km </li></ul></li></ul></li></ul></li></ul> <ul><li><ul><li><ul><li><ul><li>Juno: 244 km </li></ul></li></ul></li></ul></li></ul> <ul><li><ul><li><ul><li><ul><li>Gaspra &amp; Ida:</li></ul></li></ul></li></ul></li></ul> <ul><li><ul><li><ul><li><ul><li>Photographed by Galileo probe </li></ul></li></ul></li></ul></li></ul> <ul><li><ul><li><ul><li><ul><li>Ida even has a smaller asteroid orbiting it </li></ul></li></ul></li></ul></li></ul>

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