The Comets, Meteors and Meteorites by Carolyn Grande (I made)
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The Comets, Meteors and Meteorites by Carolyn Grande (I made)
- 1. COMETS , Meteors and Meteorites Carolyn Grande Beed IIIA Gen
- 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. Orbits of Comets Elliptical Aphelion distance in Shape Randomly Comet oriented Sun Earth Perihelion distance
- 4. SIGNIFICANCE OF COMETS . They are probably the only objects left that are made out of the original material from which the whole solar system formed about 5 billion years ago. Earth, Moon, and other celestial bodies have all been changed by tectonicprocesses, erosion, or numerous collisions. Only comets remain basically asthey were in the beginning.
- 5. Plasma Tail Dust Tail Nucleus Coma Hydrogen Cloud
- 6. Comet Structures Nucleus . made of mostly water ice and other frozen gases (the “snow”) loosely mixed with stony or metallic solids (the “dirt”). It has very low density and surface gravity. The nucleus contains most of the comet's mass but is very small (about 1 to 10 km across - or more). Nucleus - Few 10’s of km
- 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. 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 comet's motion. The tail fades as the comet moves far from the Sun.
- 9. The Tail may be Millions of km
- 10. RADIATION PRESSURE Radiation pressure or intense sunlight striking pushes the dust particles outward.
- 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.
- 13. Possible Homes for Comets Kuiper Belt Oort Cloud
- 15. 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 across separated from the next by more than 1 billion km • About 100,000 comets more than 100 km across •Oort cloud comets do not orbit the Sun in the • Kuiper belt comets orbit same direction as the the Sun in the same planets, and orbits can direction (CCW) as the be pointed in any planets direction •Kuiper belt comets lie •Orbits can span up to close to the plane of 50,000 AU planetary objects
- 16. Astronomers have catalogued about 150 short-period or periodic comets, that Period Closest Approach to have periods of revolution around the COMET (years) Sun(in AU) sun of a few years or decades up to 200 2P/Encke 3.3 0.34 years. 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
- 17. Halley’s Comet…. Orbits every 76 years The most consistently bright and most famous is COMET HALLEY
- 18. 2. Coma 3. Close to forms as a the Sun, tails 1. Far from the comet form. sun, a comet approaches consists of a the Sun. nucleus of frozen gases and dust. 5. Far from the sun 4.After going again, coma around the and tails are Sun,much gone. cometary material refreezes.
Notas do Editor
- 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!!