The Solar SystemPROJECT BYBHAVANA

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.

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!

The Nine Known Planets Inner Planets

Outer Planets

• Mercury

• Venus• Earth• Mars

• Jupiter• Saturn• Uranus• Neptune• Pluto

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

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

Venus

• Second planet from the Sun

• Approximately the same size as the Earth

• Atmosphere consists of poisonous gases

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

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

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

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

Neptune

• Eighth planet form the Sun

• Four times larger in diameter than the Earth

• Blue in color

Pluto

• Ninth planet from the Sun

• Smallest of the planets

• Coldest planet• But now it is not

considered as a planet.

Let’s compare the planets to

Earth

A day on :

Mercury = 3 Earth monthsVenus = 117 Earth daysMars = 41 minutes longer than

an Earth dayJupiter = 10 Earth hoursSaturn = 10 ½ Earth hoursUranus = 13 ½ Earth hoursNeptune = 18 Earth hoursPluto = 7 Earth days

OUR SOLAR SYSTEM

• Our solar system consists of:• 1 star , 8 planets, 63 (major) moons , asteroids, comets, meteoroids

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.

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

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

“THANK YOU”