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Planets of Our Solar System




Slide 1

Solar system

Solar system

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Slide 3

About Planets

About Planets

Planets are the large celestial bodies which revolve around the sun in closed elliptical paths called orbits. The planets shine because they reflect the light of the sun which falls on them.The easiest way to distinguish planets from the stars in the night sky is that the stars twinkle at night but the planets do not twinkle at night.The planets move around the sun from west to east, so the relative positions of the planets in the night sky keep changing day by day. The planets are very small as compared to the sun or other stars.

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There are eight planets in the solar system -

There are eight planets in the solar system -

1. Mercury

2. Venus

3. Earth

4. Mars

5. Jupiter

6. Saturn

7. Uranus

8. Neptune

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About Planets

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Inner Planets

Inner Planets

Mercury,Venus,Earth and Mars are inner planets. They are made of rocks and have metallic cores. They are comparatively small and dense bodies having solid surfaces like our Earth. Earth is the biggest of the four inner planets

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Outer planets

Outer planets

Jupiter, Saturn, Uranus and Neptune are called outer planets.The first four outer planets are very giant. They are made of hydrogen and helium gases and not of rock and metal.

All the planets revolve around the sun and also rotate on their axis. Some important facts and figures about eight planets of the solar system are given on the next slide.

Slide 8

Some important facts about planets

Some important facts about planets

Name of Diameter Distance Time taken to turn no.of

Planet of planet from sun once on its axis moons

Mercury 4880km 58*106 58 days None

Venus 12100 km 108*106 225 days None

Earth 12760km 150*106 356 1/4 days 1

Mars 6780km 228*106 687 days 2

Jupiter 142800km 778*106 11 ¾ years 28

Saturn 120000km 1427*106 29 ½ years 30

Uranus 50800km 2870*106 84 years 21

Neptune 48600km 4504*106 165 years 8

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Mercury is the first planet from the earth.During day time the surface of the mercury heats up to 430° but during night the temperature falls up to -180° c due to lack of atmosphere. Mercury has a rocky surface which is covered with craters.Mercury is sometimes visible from earth,just after sunrise or sunset. When mercury is visible just before sunrise in the morning ,it is called “Morning star” and when it is visible just after sunset, then it is called “Evening star”.It can be seen as morning star in the eastern sky in the month September and October or as evening star in the western sky in the month March and April .

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