The Sun and Solar System presented by Supratim Biswas, Class-4, DPS Ruby Park, Kolkata

1. THE SUN AND THE SOLAR
SYSTEM

2. What is a solar system?
The Sun, the eight planets and the other heavenly
bodies moving around the Sun form the solar
system.
Fun Facts

3. What are stars?
The earth and all the other heavenly bodies were
formed millions and billions of years ago as a result
of the “BIG BANG”.
It is a sudden explosion that lead to the formation of
the earth, other planets, stars, the sun and other
celestial bodies.

4. GALAXY CONSTELLATION
1. A system of millions
and billions of stars
together with gasses and
dust, held together with
gravitational attraction.
Eg: Milky Way galaxy
1.A group of stars
forming a particular
pattern in the night sky is
known as a constellation.
Eg: Orion, Leo
Difference between Galaxy and Constellation.
ORION LEO

5. What are meteors?
Meteors are small pieces of rocks from the
outer space which tries to enter the Earth’s
atmosphere with a great speed. A huge amount
of heat is generated due to the friction caused
between the layers of the atmosphere and the
meteor and they burn out. As the meteors burn
out, they glow and look like the shooting stars.
Fun
Facts

6. What is solar flares?
The sun is extremely hot and is made up of gases.
Huge explosions of energy are continuously taking
place and are known as the solar flares.
Fun
Facts

7. Terrestrial planets Gas giants
1. Inner four planets are
called the terrestrial
planets or rocky
planets.
2. They are closer to
sun and smaller in
size.
3. They are made up of
rocks and metals.
1. Outer four planets
are gas called
giants.
2. They are farther
from the sun and are
larger in size.
3. They are composed
of gasses.
Difference between Terrestrial planets and Gas giant.

8. Define Axis and Orbit
1.
Axis
2.
Orbit
It is an imaginary line passing
through the poles and centre of the
earth upon which the earth spins.
The fixed imaginary path on
along which the earth moves
around the sun is known
as the orbit.

9. Revolution Rotation
1. The spinning
movement of the
earth on its axis is
called rotation.
2. It takes 24 hours to
complete one
rotation.
3. It causes day and
night.
1. The movement of
the earth around the
sun on its orbit is
called revolution.
2. It takes 365 and ¼
the days to
complete one
revolution.
3. It causes seasons.
Difference between Rotation and Revolution.

10. Define moon
The moon is a natural satellite of the Earth. It orbits
the Earth, just as the Earth orbits the Sun. The
appear to change its shape as we can see only that
portion of the moon which is lit up by the Sun. The
phase in which the moon’s size increases is called
waxing phase. The phase in which the moon’s size
decreases is called waning phase.
Fun Facts

11. Define Sun
The Sun is a yellow dwarf star and believed to be
about 4 billion years old. It spins on its axis. It is a
part of the Milky Way galaxy.

12. THE END
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