K.J. Somaiya Comprehensive college of Education, Training and Research

Hiral ThakerRoll No. – 72Sub – ScienceClass – VIII th.

B.Ed. 2010 - 2011

A C J F H L Y B H C

H P H K F N F K K O

M G L J B U L E O M

O A D A R S Y S T E

O D L C N D S B J T

N F L K J E G F D S

S D I O R E T S A S

T B N M C X Z S P Q

Puzzle – Word game.

A C J F H L Y B H C

H P H K F N F K K O

M G L J B U L E O M

O A D A R S Y S T E

O D L C N D S B J T

N F L K J E G F D S

S D I O R E T S A S

T B N M C X Z S P Q

Puzzle – Word game.

Our Solar System

Our Solar System

Our solar system is made up of:

Sun Nine planets Their moons Asteroids Comets

Sun The Sun is the center of the solar

system. The temperature at its surface is

about 6000 degree celsius. Its size is very big. It can hold 13 lakhs earth like ours

within itself. All the other objects revolve around

the sun due to gravitational force.

SunPhotos of sun taken at 4 different wavelengths of ultraviolet

Planets Mercury. Venus. Earth. Mars. Jupiter. Saturn. Uranus. Neptune. Pluto

Inner Planets The inner four rocky

planets at the center of the solar system are:

Mercury. Venus. Earth. Mars.

Mercury

Planet nearest the sun. Second smallest planet. Covered with craters. Has no moons or rings. About size of Earth’s moon.

MercuryThese recent images from the These recent images from the MESSENGER satellite (Jan 2008) show MESSENGER satellite (Jan 2008) show a surface similar to the Moon.a surface similar to the Moon.

Venus Sister planet to Earth. Has no moons or rings. Hot, thick atmosphere. Brightest object in sky besides

sun and moon (called as morning star or evening star).

Covered with craters, volcanoes, and mountains.

VenusPioneerPioneer spacecraft image spacecraft image taken in 1979.taken in 1979.

Reflected radio waves reveal the surface topology.

Earth Third planet from sun. Only planet known to have life

and liquid water. Atmosphere composed of

Nitrogen (78%), Oxygen (21%), and other gases (1%).

The axis around which earth rotates is slightly inclined. Because of this, earth has summer and winter season.

Earth

Gulf of California

Earthphotograph from Apollo 16

EarthEarthrise – Apollo 8

Mars Fourth planet from sun. Appears as bright reddish color in

the night sky. The soil is rich in iron, which

makes it appear red. Surface features volcanoes and

huge dust storms. Has 2 moons: Phobos and

Deimos.

Mars

Outer Planets

The outer planetscomposed of gas are

: Jupiter. Saturn. Uranus. Neptune.

Jupiter Largest planet in solar

system. Brightest planet in sky 63 moons, 5 visible

from Earth. Strong magnetic field. Giant red spot. Rings have 3 parts:

Halo Ring, Main Ring, Gossamer Ring.

Jupiter

Weather on Jupiter

Saturn 6th planet from sun. Beautiful set of rings. 31 moons. Largest moon, Titan. Easily visible in the

night sky Voyager explored

Saturn and its rings.

SaturnSaturn’s Atmosphere

Uranus 7th planet from sun. Has a faint ring system. 27 known moons. Covered with clouds. Uranus sits on its side

with the north and south poles sticking out the sides.

Uranus

Neptune

8th planet from sun. Discovered through

math. 7 known moons. Triton largest moon. Great Dark Spot thought

to be a hole, similar to the hole in the ozone layer on Earth.

Neptune

Internal Structures.

Outermost Planet

Pluto, the outermost planet, is a small solid icy planet is smaller than the Earth's Moon.

Pluto

9th planet from sun (usually).

Never visited by spacecraft.

Orbits very slowly. Moon, Charon, is very

close to Pluto and about the same size.

Pluto

HST image of PlutoHST image of Pluto

Asteroids

Small bodies Believed to be left

over from the beginning of the solar system billions of years ago

100,000 asteroids lie in belt between Mars and Jupiter

Largest asteroids have been given names

AsteroidsBased on known Earth-crossing asteroid orbits, it is estimated that 3 asteroids impact Earth every 1 million years!

Comets

Small icy bodies. Travel around the Sun. Give off gas and dust as they

pass by. Consist of brilliant sphere

called its “head” and a long “tail”.

As it goes near to the sun the tail gets longer.

Comets

Halley’s Comet in 1986

EVALUATION ? Jupiter has moons. What is Solar System? How big is the Sun relative to ea

rth? Why is Mars called The Red plan

et? Write the names of Indian Astro

nauts and collect their pictures

Answer.

63 moons The sun, the nine planets,

their moons, asteroids and comets forms a solar system.

The sun is so big that it can accommodate 13 lakh Earths in it.

Because its soil is rich in iron and it appears red.

Solar SystemActivities

Order the Planets  Fun with Planets Constellations of the

Northern Sky Planets Solar System 

THANK YOU!