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The diameter of our galaxy is about 100,000 light years; it contains more than 100 billion stars, one of which is our Sun.
Milky Way, spiral galaxy, galaxy, spiral arm, halo, Solar System, Sun, black hole, Orion, light year, star, astronomy, astrophysics, geography, physics
The orbits of the 8 planets in our Solar System are elliptical.
This animation demonstrates the process of star development for average and massive stars.
The Hubble Space Telescope orbits outside the distorting influence of Earth´s atmosphere.
This animation presents some interesting facts in the field of astronomy.
The Kepler space telescope was launched by NASA to discover Earth-like planets orbiting other stars
Observatories are often built at high elevations to minimise the effects of atmospheric turbulence
A demonstration of nearby planets, stars and galaxies.
The inner planets of the Solar System are terrestrial planets while the outer planets are gas giants.
This animation shows optical and radiotelescopes used in astronomical observation.
This animation introduces the studies of astronomers and physicists whose works fundamentally changed our view of the universe.
The formation of the Sun and the planets started with the contraction of a dust cloud about 4.5 billion years ago.
The Earth is a rocky planet with a solid crust and oxygen in its atmosphere.
Massive accelerating or orbiting bodies cause ripples in spacetime. These are called gravitational waves.
Jupiter is the largest planet of the Solar System, it has two and a half times the mass of all the other planets combined.
Possible traces of water and life are sought on Mars.
Mercury is innermost and smallest planet of the Solar System.
Neptune is the outermost planet of the Solar System, the smallest of the giant planets
The largest satellite of Pluto is Charon.
Satellites orbiting the Earth can be used for civilian or military purposes.
Saturn is the second largest planet in the Solar System, easily recognisable by its rings.
The diameter of the Sun is about 109 times that of the Earth. Most of its mass consists of hydrogen.
Uranus is the 7th planet from the Sun, a gas giant.
Venus is the 2nd planet from the Sun, the brightest object on the night sky (after the Moon).
The animation shows the two-seater Lunar Rover used in the Apollo 15 mission
Lunar eclipses occur when the Moon passes through the shadow cone of Earth
Space probes and Mars rovers examine the structure of Mars and possible traces of life.
When the Sun, Earth, and the Moon are arranged in a straight line, the Moon can partially or completely obscure the Sun.
The Soviet-made satellite was the first spacecraft to be launched into outer space (in October 1957).
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.