1. Our Solar System

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The Solar System
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3. 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

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Sun
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5. 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.

6. Sun –Star of the Solar System
It is the source of (almost) all energy for life on Earth.
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.

7. Nuclear Fusion
About three quarters of the Sun's mass consists of hydrogen, while the rest is mostly helium.

8. Nuclear Fusion

9. Planets

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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 groups
Inner Terrestrial Planets: Mercury , Venus, Mars and Earth are called inner planets or terrestrial planets.
Outer Gas Planets: Jupiter , Saturn, Uranus, Neptune are also called the outer planets or gaseous planets.
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11. 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.

12. Mercury

13. 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.

14. Mercury –The Innermost Planet
 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

15. Venus

16. 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 .

17. Venus –The Veiled Planet
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.

18. Earth

19. 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 .

20. Earth –The Blue Planet 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.

21. Moon Not a Planet but the only satellite of the Earth

22. 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)

23. Moon –The Earth’s Only Satellite
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.

24. Moon –The Earth’s Only Satellite
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.

25. Mars

26. 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

27. Mars –The Red Planet 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

28. Jupiter

29. 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.

30. Jupiter –The Giant 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.

31. Saturn

32. 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

33. 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

34. Uranus

35. Uranus –A planet on its Side 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.

36. Uranus –A planet on its 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.

37. Neptune

38. Neptune –The Last Giant
Most distant gas planet.
It is named after the Roman god of the sea .
Most windy planet

39. Neptune –The Last Giant
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  years.
The average distance between Neptune and the Sun is 4.50 billion km.
Neptune was the first planet found by mathematical prediction.