The Solar System consists of the Sun and eight planets that orbit around it due to gravitational forces. The four inner planets are Mercury, Venus, Earth, and Mars. The four outer planets are Jupiter, Saturn, Uranus, and Neptune. Each planet varies in size, composition, rotation period, and other characteristics compared to Earth. For example, a day on Mercury lasts over three Earth months, while a day on Jupiter is only about 10 Earth hours. The planets also have different numbers of moons and orbital periods around the Sun ranging from 88 Earth days for Mercury to 248 Earth years for Pluto.
2. Introduction
• A solar system consists of a star
and objects that revolve around
it.
• Our Solar System consists of the
Sun and nine known planets and
the moons that orbit those
planets.
• The force of gravity keeps
planets in orbit around the sun.
3.
4. The Sun
• It is over one million times
larger than Earth.
• It is eight light minutes away
from Earth or 92,957,000 miles.
• The temperature is 15 million
degrees K. One K = 13-25 million
degrees!
5. The Nine Known Planets
Inner Planets Outer
Planets
• Mercury
• Venus
• Earth
• Mars
• Jupiter
• Saturn
• Uranus
• Neptune
• Pluto
6. Mercury
• Closest planet to the
sun
• Approximately half
the size of Earth
• Rocky surface covered
by craters
• No water or air results
in unchanged
appearance
• Surface temperatures
are hot enough to melt
lead
7. Uranus
• Seventh planet
from the Sun
• Four times larger in
diameter than the
Earth
• Blue-green in color
• The tilt of the axis
causes sunlight for
42 years at a time
8. Venus
• Second planet from
the Sun
• Approximately the
same size as the
Earth
• Atmosphere
consists of
poisonous gases
9. Earth
• Third planet from
the Sun
• Largest of the four
inner planets
• Only planet where
life is known to
exist
• 70% of the surface
is covered by water
10. Mars
• Fourth planet from
the Sun
• Approximately half
the size of Earth
• Known as the Red
Planet
• Has four seasons
similar to Earth
• Resembles Earth more
than any other planet
11. Jupiter
• Fifth planet form
the Sun
• Largest planet in
our Solar System
• 1300 Earths could
fit inside Jupiter
• Doesn’t have a
surface; made of
gases
12. Saturn
• Sixth planet from
the Sun
• Second largest
planet
• 800 Earths could
fit inside Saturn
• Thousands of rings
are made up of ice
and rock fragments
13. Neptune
• Eighth planet form
the Sun
• Four times larger in
diameter than the
Earth
• Blue in color
14. Pluto
• Ninth planet from
the Sun
• Smallest of the
planets
• Coldest planet
• But now it is not
considered as a
planet.
16. A day on :
Mercury = 3 Earth months
Venus = 117 Earth days
Mars = 41 minutes longer than
an Earth day
Jupiter = 10 Earth hours
Saturn = 10 ½ Earth hours
Uranus = 13 ½ Earth hours
Neptune = 18 Earth hours
Pluto = 7 Earth days
17. OUR SOLAR SYSTEM
• Our solar system consists of:
• 1 star , 8 planets, 63 (major) moons , asteroids, comets, meteoroids
18. The Orbital Speed of the Planets
• Mercury = 30 miles per second
• Venus = 22 miles per second
• Earth = 19 miles per second
• Mars = 15 miles per second
• Jupiter = 8 miles per second
• Saturn = 6 miles per second
• Uranus = 4.2 miles per second
• Neptune = 3.3 miles per second
• Pluto = 2.9 miles per second
Therefore, the further away from the Sun, the
slower the orbital speed.
19. The Earth has one Moon.
How many moons do the other planets have?
• Mercury - 0
• Venus - 0
• Mars - 2
• Jupiter - 17
• Saturn - 22
• Uranus - 15
• Neptune - 2
• Pluto - 1
• The Moon
20. It takes 365 days for Earth to revolve
around the Sun.
How long does it take the other planets?
• Mercury - 88 Earth days
• Venus - 225 Earth days
• Mars - about 2 Earth years
• Jupiter - 11.8 Earth years
• Saturn - 30 Earth years
• Uranus - 84 Earth years
• Neptune - 165 Earth years
• Pluto - 248 Earth years