PLANET EARTH

The universe has millions of galaxies. 
The Milky Way is a galaxy.






 In this galaxy we can find a giant star called  the Sun.

The Sun gives light and heat to the planets and satellites.




There are 8 planets.


Satellites orbit certain planets. The Moon is the Earth's satellite



The solar system consists of  the Sun and the celestial bodies that orbit it. Earth is a planet in the solar system

WHAT IS THE EARTH LIKE?

From space the Earth looks blue, white and brown. There are 4 parts:

• the atmosphere is the air that surrounds the Earth.

• the hydrosphere is the water on Earth (oceans, lakes, rivers, ice and snow in the poles and mountains)

• the biosphere is all the living things on Earth.

• the geosphere is the ball of rock. It has 3 layers

Game: Planet pursuit

NASA for kids

THE EARTH AND THE MOON

The Earth rotates. It takes our planet 24 hours to spin around once. This is called a day.

We have days and nights because of the rotation of the Earth.

It takes the Moon 29,5 days to go around the Earth.

The phases of the moon are the changing shapes of the bright part of the Moon that we see in the sky.

The phases of the moon

THE SEASONS

It takes the Earth a year (365 days and six hours) to revolve around the Sun. This path is called its orbit.

The seasons result from the Earth's axis being tilted to its orbital plane; it deviates by an angle of approximately 23.5 degrees. Thus, at any given time during summer or winter, one part of the planet is more directly exposed to the rays of the Sun. This exposure alternates as the Earth revolves in its orbit. Therefore, at any given time, regardless of season, the northern and southern hemispheres experience opposite seasons.

There are 4 seasons: spring, summer, autumn and winter.

The Earth, the Sun and the Moon