THE SOLAR SYSTEMTHE SOLAR SYSTEM

Science 2Science 2

Our Solar system Our Solar system

We live on the surface of the Earth. The We live on the surface of the Earth. The Earth is one of eight planets that orbit Earth is one of eight planets that orbit around a big star we call the Sun. around a big star we call the Sun.

The Planets The Planets

The Planets The Planets

A planet is a celestial A planet is a celestial body orbiting a star. body orbiting a star. The names of the The names of the eight planets in our eight planets in our Solar System are: Solar System are:

Mercury Mercury Venus Venus Earth Earth Mars Mars

Jupiter Jupiter SaturnSaturn Uranus Uranus NeptuneNeptune

OrbitsOrbits

OrbitsOrbits are the circular movements the are the circular movements the planets describe around the sun. The planets describe around the sun. The closer the planet is to the sun, the faster it closer the planet is to the sun, the faster it moves. moves.

The Earth takes exactly The Earth takes exactly one yearone year to to describe an orbit around the sun. describe an orbit around the sun.

The rest of the planets spend more or less The rest of the planets spend more or less time to travel round the sun. time to travel round the sun.

They are named after Roman gods. They are named after Roman gods.

Mercury Mercury

It is the closest planet It is the closest planet to the sun. to the sun.

It is made of rock It is made of rock It is very small It is very small It travels faster than It travels faster than

all the others, so it all the others, so it was named after the was named after the messenger god. messenger god.

PlanetsPlanets

Venus Venus It is the second planet It is the second planet

from the sun. from the sun. It’s very hot and it’s got It’s very hot and it’s got

a toxic atmospherea toxic atmosphere It’s the same size as the It’s the same size as the

EarthEarth You can see it at dawn You can see it at dawn

and it looks so beautiful and it looks so beautiful that was named after that was named after the godess of beauty the godess of beauty

Planets Planets

Earth Earth It is our planet, the only It is our planet, the only

we know having living we know having living things.things.

It is covered by water, It is covered by water, land and air. land and air.

The temperature is The temperature is mildmild

It has a satellite called It has a satellite called the Moon the Moon

Planets Planets

Mars Mars It is made of rock, frozen It is made of rock, frozen

ground and ironground and iron It is half the size of Earth It is half the size of Earth Scientist believe there is Scientist believe there is

ice (water) on the poles. ice (water) on the poles. It is red, so it was named It is red, so it was named

after the god of war. after the god of war. Planets Planets

Jupiter Jupiter It is the biggest planet It is the biggest planet

in our Solar System in our Solar System It is made of gases, It is made of gases,

and there are huge and there are huge storms on its surface storms on its surface

It has more than 16 It has more than 16 moons around it. moons around it.

As it is the biggest As it is the biggest one, it was named one, it was named after the king of godsafter the king of gods

PlanetsPlanets

Saturn Saturn It is made of gas, and its It is made of gas, and its

beautiful rings are made beautiful rings are made of ice and rocks of ice and rocks

It has more than 30 It has more than 30 satellites satellites

As it is so far from the As it is so far from the Sun, it takes a lot of time Sun, it takes a lot of time to orbit, so it was named to orbit, so it was named after the god of timeafter the god of time

Planets Planets

Uranus Uranus

It is another of the It is another of the four cold giant gas four cold giant gas planets planets

It is made of frozen It is made of frozen gas and ice gas and ice

It is blue, so it was It is blue, so it was named after the god named after the god of the sky of the sky

Planets Planets

Neptune Neptune

It is the eighth planet It is the eighth planet from the sun. from the sun.

It is very big, made of It is very big, made of light gaseslight gases

It has eight satellites It has eight satellites It has a color similar It has a color similar

to the ocean, so it to the ocean, so it was named after the was named after the god of the seas. god of the seas.

Planets Planets

Pluto Pluto It is not considered to be It is not considered to be

a planet anymore, as it a planet anymore, as it hasn’t got a normal orbit hasn’t got a normal orbit

It is very small and cold It is very small and cold and it is made of rockand it is made of rock

As it is so very far from As it is so very far from the sun, it was named the sun, it was named after the god of deathafter the god of death

PlanetsPlanets

The SunThe Sun The Sun is our star. All planets in our solar The Sun is our star. All planets in our solar

system orbit around it, including the Earth. system orbit around it, including the Earth. The Sun is an enormous mass of very hot The Sun is an enormous mass of very hot

gases (Helium and Hydrogen) in continuous gases (Helium and Hydrogen) in continuous explosionexplosion

These nuclear explosions give light and These nuclear explosions give light and heath to the Earth, so that life can be heath to the Earth, so that life can be possible. possible.

Never look direclty at the Sun or it might Never look direclty at the Sun or it might blind you! blind you!

The SunThe Sun

GLOSSARY GLOSSARY Celestial bodyCelestial body: Any astronomical object : Any astronomical object

existing in outter space. existing in outter space.

OrbitOrbit: Circular movement almost all the : Circular movement almost all the celestial bodies describe around a bigger celestial bodies describe around a bigger one one

PlanetPlanet: Celestial body which orbits around a : Celestial body which orbits around a star star

SatelliteSatellite: Celestial body which orbits around : Celestial body which orbits around a planet. The Moon is the Earth’s satellite. a planet. The Moon is the Earth’s satellite.