Change of seasons (basic)

Due to the Earth´s tilted axis, the angle of the Sun's rays at given latitudes is continuously changing during the year.

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Lunar eclipse

Lunar eclipses occur when the Moon passes through the shadow cone of Earth

Types of stars

This animation demonstrates the process of star development for average and massive stars.

Continental drift on a geological timescale

The Earth’s continents have been in constant motion during the history of the planet.

Countries of the World

Learning about the geographic location, capitals and flags of the world´s countries through...

The life-cycle of the Solar System

The formation of the Sun and the planets started with the contraction of a dust cloud about 4.5...

Continents and oceans

Dry land on the surface of Earth is divided into continents which are separated by oceans.


Possible traces of water and life are sought on Mars.

Geographic coordinate system

The geographic coordinate system enables every location on the Earth to be exactly specified.

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