The Cassini-Huygens Mission (1997-2017)

The Cassini spacecraft was exploring Saturn and its moons for nearly 20 years.

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The Sun's path above the major circles of latitude

The apparent movement of the Sun is caused by the Earth's rotation around its axis.

Administrative divisions of China

A presentation of the major administrative units of China.

Pluto - Charon system

The largest satellite of Pluto is Charon.

Cities of the world

This animation demonstrates the geographical locations of the Earth's major cities.

Continental drift on a geological timescale

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

Renewable sources of energy

Who wouldn’t be familiar with solar-powered calculators or windmills? Let’s have a look at the...

Geographic coordinate system

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

Structure of Earth (elementary)

The Earth is composed of several spherical layers.

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