Significant part of Universe

1. MALEEHA
FATIMA
SOLAR
SYSTEM

2. INTRODUCTION
The sun & the planets together make
the solar system. Our solar system is
elliptical (like an egg) in shape. Sun is
the center & the biggest object in our
solar system as it contains more than
99% of the solar system’s mass.
Astronomers think that solar system is
more than 4.5 billion years old.
By MaleehaFatima

3. SOLAR
SYTEM
ASTEROIDS
COMETS
SATELLITES
METEOROIDS
DWARF
PLANETS
PLANETS
By MaleehaFatima

4. PLANETS
The word “PLANET”
comes from Greek word
“PLANETES” which
means “WANDERERS”.
Planet is a term used for
a body in orbit around
the sun.
By MaleehaFatima

5. Planets
Mercury
Venus
Earth
Mars
Jupiter
Saturn
Uranus
Neptune
Inner Planets Outer Planets
By MaleehaFatima

6. DWARF PLANETS
According to International
Astronomical Union (IAU):
A dwarf planet is an
object that orbits the
sun, has enough mass to
give it a nearly round
shape, is not a satellite
of another object and
has not ‘cleared the
neighbourhood’ of its
own orbit.
Pluto, Eris, Makemake &
Ceres are examples of dwarf
planets.
By MaleehaFatima

7. Mercury is both hot &
cold. It rotates very
slowly. The side that
faces the sun become so
hot that it is hotter
than inside of an oven.
But, when that side
moves away from the
sun, it cools down until
it is colder than a
freezer.
Which planet is hot like an
oven & freezes like an ice?
By MaleehaFatima

8. Venus is the hottest planet in the
solar system. Its surface is obscured
by dense yellow clouds, contain the
sulphuric acid and rocky material.
Its atmosphere has 97% carbon
dioxide and its surface temperature
is about 460 ˚C. It is visible from
the Earth, & appears like a distant
shiny star.
Which is the hottest planet?
By MaleehaFatima

9. 1 day of Venus is equal to
243 Earth days. Venus is
unusual, as it rotates from
East to West while all
others planets rotate from
West to East. It is equal to
the size of Earth, therefore
it is termed as “sister
planet of Earth”.
By MaleehaFatima

10. In astronomy mythology,
earth’s Greek name was
Gaea. Earth was the
mother of the mountains,
valleys, streams & all other
land formations. She was
married to Uranus. The
Earth is the biggest of all
the terrestrial planets.
EARTH
By MaleehaFatima

11. Mars looks red because it is
covered with red rocks & red
dust, the colour of rust. Its
atmosphere consists mainly
of carbon dioxide & water. In
1971, dust storms covered
the whole planet. The surface
completely disappeared from
the view.
Why is the Mars
called “The red
planet”?
By MaleehaFatima

12. Which is the biggest planet?
Jupiter is the biggest & most
massive planet in the solar system.
It is 11 times as wide as the
Earth. It has a year of 11.86
Earth years. Jupiter is believed to
consist mainly of solid, liquid &
gaseous hydrogen. Jupiter’s day is
about 9.26 hrs. It is covered in
swirls of red & orange gases. It
radiates energy, possibly because
of nuclear reactions in its core or
due to gravitational force of the
planet.
By MaleehaFatima

13. Which planet has rings?
Saturn is surrounded by rings that shine
brightly in the sun light. It orbits the sun
in 29.46 years. Its total mass is about 95
times that of Earth. It has a cold nitrogen
atmosphere with traces of methane &
other gases. The most striking feature of
Saturn is its ring system, composed of ice
& rocks. The rings are made from millions
lumps of ice. Some lumps are of the size of
cubes. Others are as big as cars.
By MaleehaFatima

14. Which planet rolls upright?
In 1977, Uranus was
discovered to have five rings.
It spin as it moves around
the sun. Although, this
planet seems to be rolling
around however it spins.
By MaleehaFatima

15. Why does Neptune look
so blue?
Neptune is covered with
bright blue clouds.
Sometimes they appeared as
just coloured lines & icy
white clouds. Neptune year
is 1648 times of that of
Earth, its day is of 15.8 hrs.
By MaleehaFatima

16. Which is the
smallest planet?
Pluto is the smallest planet.
Its size is smaller than our
moon. Pluto is very far away
from the sun, it looks like a
tiny speck (a very small spot)
of light.
By MaleehaFatima

17. Is there any giant made of gas?
The planets Jupiter &
Saturn are called gas giants.
The Earth has a solid
surface while Jupiter &
Saturn don’t have solid
surface. There is a thick
layer of gas & then liquid.
Therefore, a spacecraft or
rocket cannot land on
them.
By MaleehaFatima

18. Why do Neptune &
Pluto swap places?
Most of the planets move
around the sun in huge
circles. Pluto circle is a bit
squashed. This means that
it is sometimes closer to
the sun than the Neptune.
After that it is the
Neptune’s turn to be planet
that is very far from the
sun.
By MaleehaFatima