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The Sun

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

Geography

Keywords

Sun, structure of the Sun, Solar System, Milky Way, hydrogen, helium, fusion, solar flare, sunspot, photosphere, chromosphere, corona, solar wind, granulation, solar prominence, space probe, astronomy, atomic physics, particle physics, geography, physics

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Fusion reactor

Nuclear fusion will serve as an environmentally friendly and practically unlimited source of energy.

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.

Types of stars

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

Elementary particles

Matter is made up by quarks and leptons, while interactions are carried by bosons.

Milky Way

The diameter of our galaxy is about 100,000 light years; it contains more than 100 billion stars, one of which is our Sun.

Photosynthesis

Plants are capable of converting inorganic substances (carbon dioxide and water) into organic sugar.

Solar eclipse

When the Sun, Earth, and the Moon are arranged in a straight line, the Moon can partially or completely obscure the Sun.

The Earth’s magnetic field

The Earth’s magnetic North and South poles are located near the geographic North and South poles.

Earth

The Earth is a rocky planet with a solid crust and oxygen in its atmosphere.

Hubble Space Telescope

The Hubble Space Telescope orbits outside the distorting influence of Earth´s atmosphere.

Jupiter

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

Mercury

Mercury is innermost and smallest planet of the Solar System.

Neptune

Neptune is the outermost planet of the Solar System, the smallest of the giant planets

Saturn

Saturn is the second largest planet in the Solar System, easily recognisable by its rings.

Venus

Venus is the 2nd planet from the Sun, the brightest object on the night sky (after the Moon).

Nuclear power plant

Nuclear power plants convert the energy released during nuclear fission into electric power.

The reflection and refraction of light

A ray of light is reflected or refracted at the boundary of two mediums with different refractive indices.

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