Asteroids, Comets and Meteors - PowerPoint PPT Presentation

About This Presentation
Title:

Asteroids, Comets and Meteors

Description:

Asteroids, Comets and Meteors What s the Difference? What is an Asteroid? An asteroid is a rocky, metallic object that orbits the sun in the Asteroid Belt between ... – PowerPoint PPT presentation

Number of Views:410
Avg rating:3.0/5.0
Slides: 11
Provided by: THW2
Category:

less

Transcript and Presenter's Notes

Title: Asteroids, Comets and Meteors


1
Asteroids, Comets and Meteors
  • Whats the Difference?

2
What is an Asteroid?
  • An asteroid is a rocky, metallic object that
    orbits the sun in the Asteroid Belt between Mars
    and Jupiter
  • It can be known as a planetoid or minor planet.

3
How Big Is an Asteroid?
  • Asteroids can range in size from tiny pebbles to
    about 578 miles in diameter (which is the size of
    TEXAS!)

4
The Asteroid Belt
  • The Asteroid Belt is located between Mars and
    Jupiter.
  • It is composed of about 40,000 asteroids.
  • It may be material that never formed into a
    planet. Jupiters gravity keeps the asteroids
    from swaying into the inner planets.

5
An Interesting Asteroid Fact
  • A gravitational pull of a planet can pull an
    asteroid out of its solar orbit.
  • Astronomers theorize that the two moons of Mars,
    Phobos and Deimis, are captured asteroids.

6
Meteoroids, Meteors and Meteorites
  • Meteoroids are broken pieces of asteroids.
  • A meteors is a meteoroid that has entered the
    Earths atmosphere. To us, we call it a shooting
    star.
  • Meteorites are meteors that fall to the Earths
    surface.

7
Barringer Crater
  • Over 50,000 years ago, a meteorite fell in
    Arizona.
  • The result was the Barringer Crater between
    Flagstaff and Winslow, Arizona.
  • The crater is 1 mile wide and 570 ft. deep.

8
What is a Comet?
  • It is a small, icy celestial body that orbits
    around the Sun
  • It has a nucleus, coma (blob of gas) and a tail.
  • A comet is referred to as a dirty snowball.

9
Kuiper Belt
  • Comets come from the Kuiper Belt
  • The Kuiper Belt orbits around the sun and is
    located beyond Neptune

10
Halleys Comet
  • A famous comet is Halleys comet after Sir Edwin
    Halley. It has an average orbit of 76 years
    because the gravitational pull of major planets
    alter its revolution.
  • The next time Halleys comet will be seen will be
    in 2062. How old will you be?
Write a Comment
User Comments (0)
About PowerShow.com