Mav mark 11 14 11
Download
1 / 24

Mav Mark 11/14/11 - PowerPoint PPT Presentation


  • 60 Views
  • Uploaded on

Mav Mark 11/14/11. List all 8 planets in order of distance from the sun. Comets, Asteroids, and Meteors. Notes. Comets. A comet orbits the sun. A comet is made of ice, dust, and small rocky particles. You can think of a comet as a “dirty snowball.”.

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about ' Mav Mark 11/14/11' - rad


An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript
Mav mark 11 14 11
Mav Mark11/14/11

  • List all 8 planets in order of distance from the sun.



Comets
Comets

  • A comet orbits the sun. A comet is made of ice, dust, and small rocky particles. You can think of a comet as a “dirty snowball.”


Comet Hale–Bopp, as seen on 29 March 1997 in Pazin, Croatia


Comets1
Comets

  • The brightest part of a comet is the head. A comet’s head is made up of a nucleus and a coma. The nucleus is the solid core of the comet. The coma is a fuzzy outer layer made up of clouds of gas and dust.

  • A comet’s tail usually consists of two parts: an ion tail and a gas tail. Both tails usually point away from the sun; one tail is made of gases, and the other is made of electrically charged particles.


Comets2
Comets

  • The orbit of a comet is highly elliptical, therefore it takes a very long time for comets to orbit the sun.


Comets3
Comets

  • Most comets originate in one of two regions surrounding the solar system:

  • The Kuiper Belt is a doughnut-shaped region that extends from beyond Neptune’s orbit to about 100 times Earth’s distance from the sun.

  • The Oort Cloud is a spherical region of comets that surrounds the solar system out to more than 1,000 times the distance between Pluto and the sun.


Asteroids
Asteroids

  • An asteroid is a rocky object that orbits the sun, but is still too small to be considered a planet.

  • Most asteroids are in orbit between Mars and Jupiter. The region of the solar system is called the asteroid belt.


Asteroids1
Asteroids

  • Most asteroids are less than one kilometer in diameter, but some are much larger, bringing the number of asteroids up to over 1,000,000.

  • Astronomers believe that asteroids are leftover pieces of rock from the early solar system.

  • The total mass of the asteroid belt is estimated to be just ¼ of the mass of the Luna. The four largest objects, Ceres, Vesta, Pallas, and Hygiea, account for half of the belt's total mass, with almost one-third accounted for by Ceres alone.

  • Ceres is now one of our five dwarf planets.



Number 1 is Ceres, 4 is Vesta, 2 is Pallas, and 10is Hygeia in the asteroid belt, compared to our moon in the background.


Asteroids2
Asteroids

  • Occasionally, asteroids can leave the asteroid belt due to collision or gravitational disturbances from Mars or Jupiter.

  • These loose asteroids can travel around the sun in much more elliptical orbits, which can put then in the paths of planets.

  • These impacts have been known to impact Earth every 50 million years or so. The last major impact was the K-T (Cretaceous-Tertiary) impact that led to the extinction of the dinosaurs 65 million years ago.


Meteors
Meteors

  • A meteoroid is a chunk of rock or dust in space.

  • Some meteoroids from when asteroids crash into each other. Other meteoroids from when comets break apart.

  • Meteoroids can enter Earth’s atmosphere. When one does, friction between the meteoroid and the air produces a streak of light in the sky. A meteor is a streak of light in the night sky produced by a meteoroid. Think: meteor shower.


Meteors1
Meteors

  • Most meteoroids burn up completely in that atmosphere, turning into nothing but the dust you see floating in front of bright lights.

  • However, some will strike Earth’s surface. Meteoroids that hit the ground (or a house, car, person, animal, etc.) are called meteorites.


Largest meteorite ever found in America

Mile-wide crater in Arizona

Possible life-forms on a meteorite in Antarctica


Discovered meteorites can usually be sold to museums and science labs for tens to thousands of dollars each.


ad