1. Comets and Asteroid By: Jowb Borja and Alyanna Sharyce D. Aparilla

2. asteroids http://waitingforison.wordpress.com

3. What are Asteroids? rocky-metallic to small to be planets Planetoids (minorplanets) leftover material Solar System Asteroid Belt dangerous

4. Types of Asteroids (primary) M-TYPES-TYPE C-TYPE

5. Carbonaceous Common variety 75% of known asteroids Much darker C-TYPE en.wikipedia.org

6. Moderately bright Made of nickel-iron Third most common M-TYPE abyss.uoregon.edu

7. Second most common Moderately bright Consists of iron-magnesium Dominant Inner asteroid belt S-TYPE http://en.wikipedia.org

8. leftovers formation of solar system birth of Jupiter Prevented planetary bodies from forming gap between Mars and Jupiter Causing small objects collide with each other fragment into the asteroids seen today. leftovers formation of solar system birth of Jupiter Prevented planetary bodies from forming gap between Mars and Jupiter Causing small objects collide with each other fragment into the asteroids seen today. HOW ARE ASTEROIDS FORMED?

9. snowy dirtballs Inhabit the Oort cloud, Kuiper Belt Asteroid Belt What Are Comets ?

10. Physical characteristics -Solid nucleus consist -ice (frozen water) - dust coated with dark organic material - ammonia - carbon dioxide - carbon monoxide - methane Coma Dust tail Ion tail

11. material left over from formation of planets solar wind pushed remains into the outer region remained to form lumps of frozen gas and dust. temperature :cold enough Formation

12. Orbital Characteristics Elliptical Orbit Perihelion Kepler’s Law Main Belt comets Short Period comets (periodic comets) Long Period comets Single apparition comets Sun grazers

13. Main Belt comets Comets in the Asteroid belt

14. Short period comets (Periodic Comets) 1 orbit takes 200 yrs or less originate from kuiper’s belt active comets dragged by the gravitational interactions with inner planets

15. Long Period comets 1 orbit takes 200 yrs or more originate from Oort cloud get slung inward by gravitational pull of passing stars

16. Single apparition comets Comets that are not bound to the sun

17. Sun grazers Comets that smash into the sun

18. Naming Named after their discoverer

19. History Thought to be traveling the earths atmospere 1577 astronomer Tycho Brahe revealed that comets travels far beyond the moon Isaac newton a. comets orbit around the sun b. predicted it will return again and again

20. Reference For Comets http://hubblesite.org/reference_desk/faq/answer.php.id=17&cat=solarsystem http://www.space.com/53-comets-formation-discovery-and-exploration.html http://cse.ssl.berkeley.edu/segwayed/lessons/cometstale/images/orbit.gif http://upload.wikimedia.org/wikipedia/commons/2/2b/Tycho_Brahe.JPG http://mrnussbaum.com/images/isaac_newton.jpg http://apod.nasa.gov/apod/image/0903/sungrazer_soho.jpg http://d366w3m5tf0813.cloudfront.net/wp-content/uploads/Oort-Cloud-Don- Davis.jpg http://img.docstoccdn.com/thumb/orig/126651312.png http://spaceplace.nasa.gov/review/ice-dwarf/solar-system-lrg.png

21. http://en.wikipedia.org/wiki/S-type_asteroid http://en.wikipedia.org/wiki/C-type_asteroid http://en.wikipedia.org/wiki/M-type_asteroid http://coolcosmos.ipac.caltech.edu/ask/184-What-are-asteroids- https://www.kickstarter.com/projects/1614576398/solar-circuit- racing/posts/168785 https://www.kickstarter.com/projects/1614576398/solar-circuit- racing/posts/168785 http://waitingforison.wordpress.com/updates-september-2013/ http://abyss.uoregon.edu/~js/ast121/lectures/lec18.html http://www.theguardian.com/science/2014/feb/17/asteroid-2000-em26-fly-close- earth-potentially-hazardous http://www.theguardian.com/science/2014/feb/17/asteroid-2000-em26-fly-close- earth-potentially-hazardous http://www.myfreewallpapers.net/starwars/pages/asteroids-ring.shtml http://quoteko.com/asteroid-impact-fiction.html References For Asteroid