COMETS ,Meteors and Meteorites       Carolyn Grande        Beed IIIA Gen
COMETS An icy member of our solar system. Travel in elliptical orbits around the Sun  and follow the basic laws of physi...
Orbits of Comets Elliptical                             Aphelion distance           in Shape Randomly                   ...
SIGNIFICANCE OF COMETS       .They are probably the only objects left thatare made out of the original material fromwhich...
Plasma Tail                                 Dust                                 Tail                           Nucleus   ...
Comet                   Structures Nucleus   .made of mostly water ice and other frozen gases (the“snow”) loosely mixed ...
ComaCloud  of evaporated ices and ionsmay be 100,000 km in diameter.the roughly spherical blob of gas that surrounds t...
Tail    Always points away from Sun   Solar Wind and Radiation Pressure  TYPES:  a. Ion tail: : A tail of charged gases...
The Tail may be Millions of km
RADIATION PRESSURE Radiation pressure or intense sunlight striking pushes the dust particles outward.
Origins of Comets    Comets are usually have 2 PERIODS:1.   LONG-PERIOD COMET•    are those that take more than 200 years...
Origins of Comets2
Possible Homes for Comets Kuiper Belt Oort Cloud
The Kuiper Belt Compared Against the Oort                    Cloud  Comets come from regions of the outer solar system kno...
Astronomers havecatalogued about 150short-period orperiodic comets, that                    Period      Closest           ...
Halley’s Comet….Orbits every 76 years           The most consistently bright and most           famous is COMET HALLEY
2. Coma      3. Close to                    forms as a   the Sun, tails1. Far from the     comet        form.sun, a comet ...
That’s All…THANK YOU!!!!!!!
The Comets, Meteors and Meteorites by Carolyn Grande (I made)
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  • The existence of a dark companion to the sun was prompted, in part, by a study of mass life extinctions throughout the earth’s past geological ages. Since these extinctions occurred periodically, and since one of the most recent (the dinosaurs) seems to have been associated with a major impact event on earth, scientists were led, through a long chain of logic, to propose the Nemesis theory. Can you formulate a chain of arguments that leads from periodic mass extinctions to a dark star hypothesis, given what you have learned from this lesson so far? Try!!
  • The existence of a dark companion to the sun was prompted, in part, by a study of mass life extinctions throughout the earth’s past geological ages. Since these extinctions occurred periodically, and since one of the most recent (the dinosaurs) seems to have been associated with a major impact event on earth, scientists were led, through a long chain of logic, to propose the Nemesis theory. Can you formulate a chain of arguments that leads from periodic mass extinctions to a dark star hypothesis, given what you have learned from this lesson so far? Try!!
  • The existence of a dark companion to the sun was prompted, in part, by a study of mass life extinctions throughout the earth’s past geological ages. Since these extinctions occurred periodically, and since one of the most recent (the dinosaurs) seems to have been associated with a major impact event on earth, scientists were led, through a long chain of logic, to propose the Nemesis theory. Can you formulate a chain of arguments that leads from periodic mass extinctions to a dark star hypothesis, given what you have learned from this lesson so far? Try!!
  • The existence of a dark companion to the sun was prompted, in part, by a study of mass life extinctions throughout the earth’s past geological ages. Since these extinctions occurred periodically, and since one of the most recent (the dinosaurs) seems to have been associated with a major impact event on earth, scientists were led, through a long chain of logic, to propose the Nemesis theory. Can you formulate a chain of arguments that leads from periodic mass extinctions to a dark star hypothesis, given what you have learned from this lesson so far? Try!!
  • The existence of a dark companion to the sun was prompted, in part, by a study of mass life extinctions throughout the earth’s past geological ages. Since these extinctions occurred periodically, and since one of the most recent (the dinosaurs) seems to have been associated with a major impact event on earth, scientists were led, through a long chain of logic, to propose the Nemesis theory. Can you formulate a chain of arguments that leads from periodic mass extinctions to a dark star hypothesis, given what you have learned from this lesson so far? Try!!
  • The existence of a dark companion to the sun was prompted, in part, by a study of mass life extinctions throughout the earth’s past geological ages. Since these extinctions occurred periodically, and since one of the most recent (the dinosaurs) seems to have been associated with a major impact event on earth, scientists were led, through a long chain of logic, to propose the Nemesis theory. Can you formulate a chain of arguments that leads from periodic mass extinctions to a dark star hypothesis, given what you have learned from this lesson so far? Try!!
  • The existence of a dark companion to the sun was prompted, in part, by a study of mass life extinctions throughout the earth’s past geological ages. Since these extinctions occurred periodically, and since one of the most recent (the dinosaurs) seems to have been associated with a major impact event on earth, scientists were led, through a long chain of logic, to propose the Nemesis theory. Can you formulate a chain of arguments that leads from periodic mass extinctions to a dark star hypothesis, given what you have learned from this lesson so far? Try!!
  • The existence of a dark companion to the sun was prompted, in part, by a study of mass life extinctions throughout the earth’s past geological ages. Since these extinctions occurred periodically, and since one of the most recent (the dinosaurs) seems to have been associated with a major impact event on earth, scientists were led, through a long chain of logic, to propose the Nemesis theory. Can you formulate a chain of arguments that leads from periodic mass extinctions to a dark star hypothesis, given what you have learned from this lesson so far? Try!!
  • The existence of a dark companion to the sun was prompted, in part, by a study of mass life extinctions throughout the earth’s past geological ages. Since these extinctions occurred periodically, and since one of the most recent (the dinosaurs) seems to have been associated with a major impact event on earth, scientists were led, through a long chain of logic, to propose the Nemesis theory. Can you formulate a chain of arguments that leads from periodic mass extinctions to a dark star hypothesis, given what you have learned from this lesson so far? Try!!
  • The existence of a dark companion to the sun was prompted, in part, by a study of mass life extinctions throughout the earth’s past geological ages. Since these extinctions occurred periodically, and since one of the most recent (the dinosaurs) seems to have been associated with a major impact event on earth, scientists were led, through a long chain of logic, to propose the Nemesis theory. Can you formulate a chain of arguments that leads from periodic mass extinctions to a dark star hypothesis, given what you have learned from this lesson so far? Try!!
  • The existence of a dark companion to the sun was prompted, in part, by a study of mass life extinctions throughout the earth’s past geological ages. Since these extinctions occurred periodically, and since one of the most recent (the dinosaurs) seems to have been associated with a major impact event on earth, scientists were led, through a long chain of logic, to propose the Nemesis theory. Can you formulate a chain of arguments that leads from periodic mass extinctions to a dark star hypothesis, given what you have learned from this lesson so far? Try!!
  • The existence of a dark companion to the sun was prompted, in part, by a study of mass life extinctions throughout the earth’s past geological ages. Since these extinctions occurred periodically, and since one of the most recent (the dinosaurs) seems to have been associated with a major impact event on earth, scientists were led, through a long chain of logic, to propose the Nemesis theory. Can you formulate a chain of arguments that leads from periodic mass extinctions to a dark star hypothesis, given what you have learned from this lesson so far? Try!!
  • The existence of a dark companion to the sun was prompted, in part, by a study of mass life extinctions throughout the earth’s past geological ages. Since these extinctions occurred periodically, and since one of the most recent (the dinosaurs) seems to have been associated with a major impact event on earth, scientists were led, through a long chain of logic, to propose the Nemesis theory. Can you formulate a chain of arguments that leads from periodic mass extinctions to a dark star hypothesis, given what you have learned from this lesson so far? Try!!
  • The existence of a dark companion to the sun was prompted, in part, by a study of mass life extinctions throughout the earth’s past geological ages. Since these extinctions occurred periodically, and since one of the most recent (the dinosaurs) seems to have been associated with a major impact event on earth, scientists were led, through a long chain of logic, to propose the Nemesis theory. Can you formulate a chain of arguments that leads from periodic mass extinctions to a dark star hypothesis, given what you have learned from this lesson so far? Try!!
  • The existence of a dark companion to the sun was prompted, in part, by a study of mass life extinctions throughout the earth’s past geological ages. Since these extinctions occurred periodically, and since one of the most recent (the dinosaurs) seems to have been associated with a major impact event on earth, scientists were led, through a long chain of logic, to propose the Nemesis theory. Can you formulate a chain of arguments that leads from periodic mass extinctions to a dark star hypothesis, given what you have learned from this lesson so far? Try!!
  • The existence of a dark companion to the sun was prompted, in part, by a study of mass life extinctions throughout the earth’s past geological ages. Since these extinctions occurred periodically, and since one of the most recent (the dinosaurs) seems to have been associated with a major impact event on earth, scientists were led, through a long chain of logic, to propose the Nemesis theory. Can you formulate a chain of arguments that leads from periodic mass extinctions to a dark star hypothesis, given what you have learned from this lesson so far? Try!!
  • The existence of a dark companion to the sun was prompted, in part, by a study of mass life extinctions throughout the earth’s past geological ages. Since these extinctions occurred periodically, and since one of the most recent (the dinosaurs) seems to have been associated with a major impact event on earth, scientists were led, through a long chain of logic, to propose the Nemesis theory. Can you formulate a chain of arguments that leads from periodic mass extinctions to a dark star hypothesis, given what you have learned from this lesson so far? Try!!
  • The existence of a dark companion to the sun was prompted, in part, by a study of mass life extinctions throughout the earth’s past geological ages. Since these extinctions occurred periodically, and since one of the most recent (the dinosaurs) seems to have been associated with a major impact event on earth, scientists were led, through a long chain of logic, to propose the Nemesis theory. Can you formulate a chain of arguments that leads from periodic mass extinctions to a dark star hypothesis, given what you have learned from this lesson so far? Try!!
  • The existence of a dark companion to the sun was prompted, in part, by a study of mass life extinctions throughout the earth’s past geological ages. Since these extinctions occurred periodically, and since one of the most recent (the dinosaurs) seems to have been associated with a major impact event on earth, scientists were led, through a long chain of logic, to propose the Nemesis theory. Can you formulate a chain of arguments that leads from periodic mass extinctions to a dark star hypothesis, given what you have learned from this lesson so far? Try!!
  • The Comets, Meteors and Meteorites by Carolyn Grande (I made)

    1. 1. COMETS ,Meteors and Meteorites Carolyn Grande Beed IIIA Gen
    2. 2. COMETS An icy member of our solar system. Travel in elliptical orbits around the Sun and follow the basic laws of physics. Throughout history, people have dreaded them as omens of human disasters such as wars of famines.
    3. 3. Orbits of Comets Elliptical Aphelion distance in Shape Randomly Comet oriented Sun Earth Perihelion distance
    4. 4. SIGNIFICANCE OF COMETS .They are probably the only objects left thatare made out of the original material fromwhich the whole solar system formed about 5billion years ago.Earth, Moon, and other celestial bodieshave all been changed by tectonicprocesses,erosion, or numerous collisions. Only cometsremain basically asthey were in thebeginning.
    5. 5. Plasma Tail Dust Tail Nucleus Coma Hydrogen Cloud
    6. 6. Comet Structures Nucleus .made of mostly water ice and other frozen gases (the“snow”) loosely mixed with stony or metallicsolids (the “dirt”).It has very low density and surface gravity.The nucleus contains most of the comets mass but is verysmall (about 1 to 10 km across - or more). Nucleus - Few 10’s of km
    7. 7. ComaCloud of evaporated ices and ionsmay be 100,000 km in diameter.the roughly spherical blob of gas that surrounds the nucleus of a comet Coma - May be 1000’s of km
    8. 8. Tail  Always points away from Sun  Solar Wind and Radiation Pressure TYPES: a. Ion tail: : A tail of charged gases (ions) always faces away from the sun because the solar wind (ions streaming from the sun at high velocities) pushes it away (it is also called the plasma tail) b. Dust tail: a long, wide tail composed of microscopic dust particles that are buffeted by photons emitted from the Sun; this tail curves slightly due to the comets motion. The tail fades as the comet moves far from the Sun.
    9. 9. The Tail may be Millions of km
    10. 10. RADIATION PRESSURE Radiation pressure or intense sunlight striking pushes the dust particles outward.
    11. 11. Origins of Comets Comets are usually have 2 PERIODS:1. LONG-PERIOD COMET• are those that take more than 200 years to revolve once around the sun or may be a tangent and never come back again. Usually, these comets come from the Oort cloud.• This expansive cloud of maybe over 3 trillion comets encompasses our solar system 18 trillions miles away from the sun and is believed to be the remains during the creation of the solar system.
    12. 12. Origins of Comets2
    13. 13. Possible Homes for Comets Kuiper Belt Oort Cloud
    14. 14. The Kuiper Belt Compared Against the Oort Cloud Comets come from regions of the outer solar system known as the Kuiper belt and the Oort cloud. Oort cloud comets: ( Jan Oort) Kuiper belt comets:• About a trillion comets ( Gerard Kuiper) • About a billion comets• Each comet is typically more than 10 km acrossseparated from the nextby more than 1 billion km • About 100,000 comets more than 100 km across•Oort cloud comets donot orbit the Sun in the • Kuiper belt comets orbitsame direction as the the Sun in the sameplanets, and orbits can direction (CCW) as thebe pointed in any planetsdirection •Kuiper belt comets lie•Orbits can span up to close to the plane of50,000 AU planetary objects
    15. 15. Astronomers havecatalogued about 150short-period orperiodic comets, that Period Closest Approach tohave periods ofrevolution around the COMET (years) Sun(in AU)sun of a few years ordecades up to 200 2P/Encke 3.3 0.34years. 21P/Giacobini- 6.6 1.03 Zinner 14P/Wolf 8.2 2.41 55P/Tempel 33.2 0.98 -Tuttle 1P/Halley 76.0 0.59
    16. 16. Halley’s Comet….Orbits every 76 years The most consistently bright and most famous is COMET HALLEY
    17. 17. 2. Coma 3. Close to forms as a the Sun, tails1. Far from the comet form.sun, a comet approachesconsists of a the Sun.nucleus of frozengases and dust. 5. Far from the sun 4.After going again, coma around the and tails are Sun,much gone. cometary material refreezes.
    18. 18. That’s All…THANK YOU!!!!!!!

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