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Planets, sizes

Planets, sizes

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

Geography

Keywords

planets, Solar System, inner planets, outer planets, rocky planet, gas planet, Sun, Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune, red supergiant, axis of rotation, astronomy, geography

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Questions

  • Which planet was named after the god of travelers and merchants, the protector of thieves? \nClick on the picture of the planet.
  • Which planet has a surface temperature changing between\n-70 °C (-94 °F) and +56 °C (+132.8 °F)?\nClick on the picture of the planet.
  • Which planet has the strongest wind in the solar System, reaching a speed of 2,000 km/h? (1,240 mph)\nClick on the picture of the planet.

Scenes

  • The Sun diameter: 1,392,000 km (864,948.7 mi), (109 Earths) mass: 1.989x10³⁰ kg (4.39×10³⁰ lb), (333,000 Earths)

  • - This star is classified as a yellow dwarf, its diameter is 109 times the diameter of the Earth. It was formed around 4.5 billion years ago. In 4-5 billion years, it will become a red giant. By this time, its surface will reach beyond the Earth's current orbit. Nuclear fusion inside its core will stop, radiation pressure will cease to exists and it will eventually collapse into a white dwarf.
  • - One of the largest known stars of the Universe, a red giant 3,900 light-years away from the Earth. Its diameter is more than 1,400 times larger than that of the Sun, with nearly 2 billion kilometers (1,24×10⁹ mi) (although according to other calculations, its diameter is nearly 3 billion kilometers or 1,86×10⁹ mi). It would take an airplane traveling at a speed of 1,000 km/h (620 mph) about 700 years to complete one orbit around the star. If this star was in the center of our Solar System, Jupiter's orbit would be inside it. Canis Majoris will either become a black hole or a neutron star after it explodes as a supernova.

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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 Solar System; planetary orbits

The orbits of the 8 planets in our Solar System are elliptical.

Earth

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

Kepler´s laws of planetary motion

The three important laws describing planetary motion were formulated by Johannes Kepler.

Mars

Possible traces of water and life are sought on Mars.

Mercury

Mercury is innermost and smallest planet of the Solar System.

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.

Our astronomical neighborhood

A demonstration of nearby planets, stars and galaxies.

Saturn

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

The New Horizons mission

The New Horizons space probe was launched in 2006, with the objective to study Pluto and the Kuiper Belt.

The Sun

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

Uranus

Uranus is the 7th planet from the Sun, a gas giant.

Venus

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

Voyager space probes

The Voyager space probes were the first man-made objects to leave the Solar System. They gather data about outer space and carry information about humanity.

Comets

Comets are spectacular celestial bodies orbiting the Sun.

Hubble Space Telescope

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

Neptune

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

Pluto - Charon system

The largest satellite of Pluto is Charon.

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 Cassini-Huygens Mission (1997-2017)

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

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.

Kepler space telescope

The Kepler space telescope was launched by NASA to discover Earth-like planets orbiting other stars

Mars Exploration Program

Space probes and Mars rovers examine the structure of Mars and possible traces of life.

Space Shuttle

The Space Shuttle was a manned, reusable spacecraft operated by NASA.

Sputnik 1 (1957)

The Soviet-made satellite was the first spacecraft to be launched into outer space (in October 1957).

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.

Types of stars

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

Weightlessness

A spacecraft on its path is in a constant state of free fall.

Interesting astronomy facts

This animation presents some interesting facts in the field of astronomy.

ISS

The International Space Station is a habitable satellite built with the cooperation of 16 countries.

Satellite types

Satellites orbiting the Earth can be used for civilian or military purposes.

Structure of the Earth (intermediate)

The Earth is composed of several spherical layers.

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