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Comets are spectacular celestial bodies orbiting the Sun.



asteroid, meteor, comet, Halley-üstökös, Halley, astronomy, Solar System, Oort cloud, asteroid belt, astronomical object, Kuiper Belt, space research, orbital period around the Sun, outer space, physics, Sun, geography

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Planets, sizes

The inner planets of the Solar System are terrestrial planets while the outer planets are gas giants.

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 billion years ago.

The Sun

The diameter of the Sun is about 109 times that of the Earth. Most of its mass consists of hydrogen.


Jupiter is the largest planet of the Solar System, it has two and a half times the mass of all the other planets combined.


Observatories are often built at high elevations to minimise the effects of atmospheric turbulence

The Dawn mission

Studying Ceres and Vesta will help us learn more about the early history of the Solar System and how rocky planets are formed.

Newton’s Laws of Motion

This animation demonstrates Sir Isaac Newton's three laws of motion that laid the foundation for classical mechanics.

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