The Earth is the planet where we live.Life is possible on the Earth because there is oxygen.

The moon is the natural satellite of the Earth.The moon takes 28 days to go around the Earth

Mars is the nearest planet to the Earth.It’s called the red planet.

Mercury is the nearest planet to the sun.It is also the smallest planet in our Solar System.

Jupiter is the biggest planet in our Solar System. It’s eleven times bigger than the Earth.

Saturn is seven times bigger than the Earth.There are three rings around Saturn.

Astronauts go up to space in rockets.They sleep in sleeping bags on the wall.

There are thousands of stars in the sky.The nearest star to the Earth is the Sun.

Aliens come from other planets.They use UFOS to travel in space.