Mars is the planet from the sun.
Because it is like the Earth is called the Earth’s twin.
has extreme temperatures , about 500° during the night and - 170° at night.
Venus is the planet from the sun.
The atmosphere on Venus is made up mostly of .
The largest in the solar system is Olympus Mons.
The space probes made many discoveries about Mars.
Polar ice caps can be found on .
It takes Mercury about to go around the sun once.
Mercury was named after the Roman of the gods.
There is almost the same on Venus as on our Earth.
Venus has a very thick so it is impossible to see the surface.
Venus is the planet in the solar system.
The of Venus is flat with a few high mountains.
Venus was named after the of beauty.
Life on Earth exists because there is in the atmosphere.
The layer protects us from the sun’s rays.
The of the Earth is made up of liquid iron and nickel.
There are on the surface of Mars that run for thousands of kilometres.
Older astronomers thought that Mars had a system of .