other members of ss

7/29/2019 Other Members of SS

1/34


2/34

Solar System Formation


3/34

Your Parents Solar System


4/34

21st Century Solar System


5/34

Sun

TerrestrialPlanets

Asteroid Belt

Jovian

PlanetsKuiper Belt

Oort Cloud

The 21st Century Solar System


6/34

Asteroids

253 Mathilde951 Gaspra 243 Ida


7/34

Asteroids(also called planetoids)

Are rocky or metallic objects that orbitthe sun in the same way that planets

orbit.

Asteroids are hard to see because theyreflect little light and they are always on

the move.

None of the asteroids has an atmosphere.

Believed to be fragments of an exploded

planet or planet that failed to form.


8/34

Many asteroids orbit the sun in a region

between Mars and Jupiter. This area is

called the asteroid belt.


9/34

A larger object such as a planet may

pull an asteroid out of orbit. And oncean asteroid is captured by the

gravitational pull of a planet, it may

become a satellite of that planet.

Many astronomers believe that the two

satellites of Mars, Phobos and Deimos,

are captured asteroids.


10/34

What prevents the asteroidsin the belt from moving

towards the sun and hittingthe inner planets, including

our Mother Earth?


11/34

If it were not for the giant planet Jupiter

pulling the asteroids outward, largeasteroids would constantly bombard

Mercury, Venus, Mars and Earth.

Since the belt is closer to Jupiter than it is tothe sun, Jupiter exerts more gravitational

pull on the asteroids than the sun. As a

result, the asteroids are kept in orbit awayfrom the inner planets.


12/34

Meteoroids, Meteors andMeteorites


13/34

Meteor burning up in theatmosphere.


14/34

Meteoroids

Are chunks of rock or metal, smaller than

an asteroid, orbiting the sun.

Most meteoroids are so small and have no

visible trace when they burn up in theatmosphere.

Meteoroids travel around the sun in a

variety of orbits and at various speeds. Theyare believed to form when asteroids hit each

other as they orbit.


15/34

Meteor

Is a light in the night sky resulting

from a meteoroid entering earths

atmosphere. The light is caused by friction between

the fast-moving meteor and the

atmosphere.

Its glow may last for several seconds


16/34

Have you seen a shooting star?

Shooting star is a spark of light in

the night sky when a meteor burns

up as it enters the earths

atmosphere.

It is actually afalling meteor.


17/34

What is meteor shower?

Meteor shower happens when

the Earth crosses the orbit of astream of meteoroids.


18/34

Meteorite

Is a meteor that reaches the Earths surface. Based from the scientists record, meteorites

constantly hit the Earths surface.

Approximate size of meteorites Number of pieces that hit the Earth

Pea-size 10 per hour

Kasoy nut-size 1 per hour

Lansones-size 1 per 10 hours

Basketball-size 1 per month

50-meter-size 1 per 100 years

1 kilometer-size 1 per 500,0000 years


19/34

Dwarf Planets


20/34

20

What is a planet?

In 2006 the International AstronomicalUnion (IAU) redefined what a planet is. A

planet:

1.Is a body that orbits the sun2.Is large enough for its own gravity to make

it round

3.And has "cleared its neighborhood" ofsmaller objects

4.Is not a satellite.


21/34

What is a Dwarf Planet?

Celestial body orbiting the Sun

Massive enough to be rounded by its own

gravity

BUT has NOT cleared its neighboring

region of planetesimals

Is not a satellite


22/34

5 Known Dwarf Planets:

1. Ceres - the smallest identified dwarfplanet in the Solar System and the only

dwarf planet in the asteroid belt.

was discovered on January 1, 1801 andwas considered a planet for half a

century.

Was classified as a dwarf planet on

September 13, 2006


23/34

2. Eris - the largest known dwarf planetin the Solar System and the ninth

largest body known to orbit the Sun.

Was discovered on January 5, 2005. The media once referred to it as the

10thplanet.

It was accepted as a dwarf planet on

September 13, 2006.


24/34

3. Pluto the second largest known dwarf

planet in the solar system. it has 3 known moons: Charon, Nix,

Hydra

Was discovered on February 18, 1930and was classified as a planet for 76

years.

It was classified as a dwarf planet on

August 24, 2006.


25/34

4. Makemake was discovered on

March 31, 2005 and was classified

as a dwarf planet on July 11,

2008.5. Haumea was discovered on

December 28, 2004. It was

accepted as a dwarf planet onSeptember 17, 2008.


26/34

Makemake is the creator of humanity in the

mythos of the Rapa Nui, the native peopleof Easter Island. The name choice preserves

the planetary object's connection with

Easter.

Haumea is the Hawaiian goddess ofchildbirth and fertility.

The moons "Hiiaka" and "Namaka are

named after after two of Haumea'sdaughters.


27/34

Dwarf Planets

K i B l


28/34

Kuiper Belt


29/34

Comet P/Halley Comet P/Wilt

Comets


30/34

Comet

Is an object that also travels in an orbitaround the sun.

It is composed of dust and particles mixed

with frozen water, methane and ammonia. Since a comet is a mass of frozen gas and

rock particles, it develops a bright tail when

it passes near the sun. Frozen water,methane and ammonia begin to vaporize

because of the heat from the sun.


31/34

Parts of a Comet


32/34

Oort Cloud

Most comets are thought to originate from a

huge cloud called the Oort Cloud.

Spherical cloud of comets.

May contain trillions of comets

The outer edge is the farthest reach of the

Suns gravitational pull.

There are no confirmed observationsits

existence is theoretical only.

O t Cl d


33/34

Oort Cloud


34/34

Assignment:Read about the appearances of

comets and be ready to shareit to the class.

other members of ss

Documents