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What is Solar System

• The Sun, its planets and all the objects moving around them collectively are called Solar System.

• The Solar System is entirely dependent on Sun & the only one which is self- luminous i.e which has its own light.

• Rest of the planets reflect the light received from Sun


Solar System


Sun


Sun –Star of the Solar System

• It ‘s the heaviest among solar system

• It is a ball of hot ,burning gases.

• It is the nearest star to the earth.

• The light from the Sun takes appx. 8 minutes to reach Earth.


• It is the source of all energy for life on Earth.• About three quarters of the Sun's mass

consists of hydrogen, while the rest is mostly helium.

• On the Sun’s surface ,there are dark patches known as sunspots. These are patches of gas that looks dark since they are cooler than their surroundings.

Sun –Star of the Solar System


Planets


Planets• Planet word comes from Greek ,which means wandering

star.• Planets are heavenly bodies ,which revolve around the Sun

in elliptical orbits.• Earlier it was considered there were 9 planets in Solar

system but lately one planet called Pluto was de-classified from being a planet.

• All planets fall in 2 groupsInner Planets: Mercury , Venus, Mars and Earth are called

inner planets.Outer Planets: These are Jupiter , Saturn, Uranus, Neptune


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• Between Inner & Outer Planets ,there is a ring of small bodies , which are made of rock & metal, these are called Asteroids. They also keep moving around the Sun .This ring is also called Asteroids Belt.


Mercury


Mercury –The Innermost Planet

• It is named after messenger of the Roman gods

• It is the closest planet to the Sun

• Large variations in day(400 degree C) & night (-

180 degree C) time temperatures.


• It is also the smallest, and its orbit is the most not fully circular.

• It does not have any satellite.• There is no water or atmosphere• It can be seen with naked eyes.• It orbits the Sun once in about 88 Earth days• There are no seasons on its surface

Mercury –The Innermost Planet


Venus


Venus –The Veiled Planet

• Venus is surrounded by thick cloud cover ,that is why it is called “Veiled Planet”.

• It is brightest & hottest planet.

• It is named after Roman goddess of love & beauty .


• It orbits the Sun once in about 225 Earth days.• Venus reaches its maximum brightness shortly

before sunrise or shortly after sunset, so it is also known as the Morning Star or Evening Star.

• Venus is also known as “Sister “ or “Twin” planet to earth because of its similar size & mass to earth.

Venus –The Veiled Planet


Earth


Earth –The Blue Planet

• It is also known as watery planet, because 70% of its surface is covered by water.

• It reflects about 1/3rd of sunlight it receives .The earth’s atmosphere scatters the light & creates a blue effectn,so it is also called Blue Planet..

• Only planet having life .www.makemegenius.com


• It orbits the Sun once in about 365 Earth days.• It rotates about its own axis, thus creating day &

night. It takes 24 hours to do that.• It revolves around sun, due to its tilt ,seasons are

created.• Due to gravity, the layer of gases remain attached

to it (which is known as atmosphere), it prevents too much heat or UV rays from Sun reaching earth.

• Moon is the only satellite of the Earth.

Earth –The Blue Planet


MoonNot a Planet but the only satellite of

the Earth


Moon –The Earth’s Only Satellite

• It’s diameter of only 1/4th of the Earth

• It looks bigger to us as it is very close to us.

• The moon has no atmosphere ,so there is huge difference between day & night temperature. (127 degree C in Day to -173 degree C in Night)


• As there is no atmosphere, there is no weather, no rain, no wind or clouds.

• Like everything else in Solar System, Moon also does not have its own light . It shines due to Sun’s light .

• There is no water on its surface.• Moon’s gravity is 1/6th of Earth, so your weight

would be 1/6th of your weight on the earth.



• The Moon is the only celestial body other than Earth on which humans have set foot.

• Neil Armstrong became the first person to walk on the Moon as the commander of the American mission Apollo 11by first setting foot on the Moon on 21 July 1969.



Mars


Mars –The Red Planet

• It is named after the Roman god of war.

• It is often described as the "Red Planet", as the iron oxide prevalent on its surface gives it a reddish appearance


• Mars has approximately half the diameter of Earth• It has two satellites.• The gravity of Mars is half of the earth .• The atmosphere of Mars consists of about

95% carbon dioxide, 3% nitrogen,1.6% argon and contains some oxygen and water• Mars also has the largest dust storms in the Solar

System

Mars –The Red Planet


Jupiter


Jupiter –The Giant Planet

• It is named after the Roman god Jupiter (ruler of Roman gods)

• Jupiter is the largest planet within the Solar

System• It has a great Red

Spot ,it is rotating storm system inside the planet.


• Jupiter rotates faster than any other planet.• It completes one rotation in 10 hours• Jupiter has a faint ring system, these rings

appear to be made of dust.• This is also a windy planet as the fast rotation

causes high winds.• It has 16 planets.

Jupiter –The Giant Planet


Saturn


Saturn –The Jewel Planet

• Saturn is the sixth planet from the Sun and the second largest planet in the Solar System, after Jupiter.

• It is named after the Roman god Saturn

• Saturn is classified as a gas giant planet

It is the most beautiful planet in solar system because of its spectacular rings www.makemegenius.com


Saturn-The Jewel Planet

• Saturn rings are made up of ice & ice covered particles

• It has 22 known satellites .• It can be seen by naked eye • Saturn is 95 times heavier than earth • it takes Saturn 10,759 Earth days (or about

29½ years), to finish one revolution around the Sun


Uranus


Uranus –A planet on its

• Uranus appears to lie on its side.

• It is named after the Roman god of the sky.

• The only planet which rotates on its axis from east to west.

Side


• It has at least ten thin uniform black rings ,which are made of dust.

• It has 27 known satellites• It is a very cold planet ,it receives 370 times

less sunlight than Earth as it is far away from sun as compared to Earth.

• Its core is very rocky.

Uranus –A planet on its Side


Neptune


Neptune –The Last Giant

• Most distant gas planet.

• It is named after the Roman god of the sea .

• Most windy planet


• Can’t be seen with naked eye• It has 8 known satellite• As it is very far from Sun,it completes an orbit

on average every 164.79 years.• The average distance between Neptune and

the Sun is 4.50 billion km.• Neptune was the first planet found by

mathematical prediction.

Neptune –The Last Giant


Submitted by

• Shubha Class VIII th , Govt Public School ,Gurgaon

Thanks to Google & www.makemegenius.com


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