According to the weather forecast, tomorrow will be sunny and hot.

Astronomers have been studying stars like the Sun.

The atmosphere is the mixture of gases around a planet.

Scientists claim they have discovered a new star.

It's going to rain – look at those big grey clouds.

The distance from Earth to the Sun is 149.6 million kilometers.

Our galaxy is an extremely large group of planets and stars.

Gravity is the power that makes something fall to the ground.

He pointed a gun at me – I thought he was going to shoot me!

I can't identify the woman, but my friend might know who she was.

Many planets have don't have water. In other words, they cannot support life.

The planet is 20 light years away from Earth.

Water is the most important liquid on Earth.

You use a mirror to look at yourself.

The atmosphere is the mixture of gases around a planet.

Neither Jupiter nor Uranus is close to the Sun.

The movement of a planet around a star is called its orbit.

There may be lots of other planets like Earth in the universe.

There is a possibility that there is life on other planets.

According to a new report by scientists, there are many planets which can support life.

In the future, robots that look like people will clean our houses.

The coast was so rocky that we couldn't get to the beach.

Scientists claim they have discovered a new star.

They're quite similar – their size and shape are almost the same.

It's possible to see planets outside our solar system with a telescope.

You can see the stars in the sky at night.

Is the Earth the only planet that can support life?

About 70% of the Earth's surface is covered with water.

It's possible to see planets outside our solar system with a telescope.

Average temperatures in Sydney are 8–16°C in July and 18–26°C in January.

A torch is a piece of equipment with an electric light that you use to see in the dark.

A trillion is the same as one million million.

Many people see strange things flying in the sky and think they are UFOs.

We can't be the only planet in the universe where there is life.