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Can you guess what these words have in common?
clouds
stars
the sun
the moon
aircraft
rainbows
birds
They are some of the objects we can see from Earth.
Some, like the clouds, are closer to us in the atmosphere.
Others, like the stars, are far away in outer space.
Science – Unit 3 –Lesson 1 – image – clouds
The sun is the centre of the solar system and is actually a star.
It is made up of extremely hot burning gases.
It gives Earth heat and light.
The twinkling stars we see are far beyond our solar system.
They are not all the same as our sun - they can be bigger, smaller, hotter or cooler.
Plutoids and dwarf planets orbit the sun like the planets.
Like planets, they have enough gravity (force) to pull themselves into a round shape.
But they don’t have enough gravity to control other space bodies around them.
Most of the planets have one or more moons.
A moon is a space body that orbits a planet as it orbits the sun.
Science – Unit 2 – Lesson 1 – image – earth's moon
Comets are chunks of dirty ice, dust and gas.
When a comet gets too close to the sun, the ice starts to melt.
This pushes out from the comet with other material to form a tail.
Asteroids are chunks of rock which orbit the sun, mainly in a belt between Mars and Jupiter.
They can be as small as a grain of sand or as large as a small planet.
Sometimes we call them falling stars or shooting stars, but they are not really stars.
Meteors are pieces of rocky or metal material which come into the Earth’s atmosphere and burn up.
They look like bright streaks of light.
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